A 40-Bed Elderly Care Home Lost 9 Residents Because of a Smell in the Building That Daily Cleaning Would Not Remove
Last updated: 7 Sep 2026 | 3 Views |
A true story from a 40-bed elderly care home outside Bangkok, Thailand
A 40-Bed Elderly Care Home Lost 9 Residents Because of a Smell in the Building That Daily Cleaning Would Not Remove
When the first thing a family notices walking in to visit is what decides whether they leave their parent in your care
A 40-bed elderly care home outside Bangkok had nine families move their relatives out within six months, all citing the same reason: the smell in the building. The home cleaned daily and changed linen to standard. Here is the real cause, and how ozone disinfection resolved it.
Patcharee, 45, manages a 40-bed elderly care home she opened six years ago, with registered nurses on staff, care assistants, and a physiotherapist on a schedule — and standards of care she has always been proud of.
But over the past six months, nine families moved their relatives out — an unusually high figure against previous years. When Patcharee phoned every one of them and asked directly, she got almost the same answer each time: the smell in the building.
What confused her is that the home mops the floors daily, changes linen to standard, handles clinical waste as required, and passes every inspection. Yet the smell remained, and families noticed it every time they visited.
What nine phone calls to departed families revealed
Patcharee decided to phone all nine families who had moved their relatives out, saying up front that she was not asking them to return, but genuinely wanted to know what the home should improve. She calls it the hardest set of calls she has ever made, and the most valuable.
Seven of the nine raised the smell, and their descriptions were strikingly consistent. None said the home was dirty. They said they could sense a particular kind of smell the moment they walked in — and that it made them think about their parent living with it around the clock.
One family member said something Patcharee wrote down: I could see the nurses looking after my mother very well. I have no complaint about the care at all. But every time I go home, I cannot sleep, because I think about her breathing that all day.
That sentence, she says, made her understand that this was not about cleanliness or standards of care. It is about the guilt an adult child carries at leaving a parent in someone else's hands — and smell triggers that feeling directly.
What the team found on a detailed survey
Patcharee asked the World Health Disinfection team to survey the whole building. They spent half a day walking every area and showed her that odour in an elderly care setting comes from several sources accumulating together, not one.
The first is mattresses and seat cushions, materials with foam inside that absorb moisture and organic matter continuously. Bed-bound residents spend all twenty-four hours on the same mattress, so accumulation happens far faster than in ordinary accommodation.
The second is bed curtains, doormats and wheelchair cushions — porous materials routinely overlooked in daily cleaning. The third is bathrooms and the laundry area, particularly drains and crevices where moisture is permanently present.
The fourth, which the team emphasised, is the air conditioning system. Because the home runs air conditioning almost constantly in a relatively sealed building, odour from every source is drawn into the system and blown back out across the whole building — which is why it is perceptible everywhere rather than only at its source.
What it cost the home
Nine residents moving out equates to roughly 2,700,000 baht a year — a large enough share for a 40-bed home to affect cash flow and its ability to employ registered nursing staff.
But the heavier cost, Patcharee says, is reputation. Elderly care runs almost entirely on word of mouth and on referrals from hospitals and social workers, and families who leave citing a smell will tell others.
A cost that is hard to measure but matters greatly is staff morale. Nurses and care assistants who work devotedly, and who are praised by families for their care, then watch residents they have looked after for months moved out for a reason they cannot fix themselves.
And there is a dimension that is not about money at all: the quality of life of the residents themselves. Many bed-bound residents cannot express how they feel, yet they are in that environment twenty-four hours a day — a responsibility the home cannot avoid.
What the home did, and the result in three months
The team proposed a two-part plan. The first covered what could be handled in routine work: increasing the frequency of bed curtain laundering, switching to doormats that can be washed often, cleaning bathroom and laundry drains on a schedule, and servicing every air conditioning unit.
The second was ozone treatment of the whole building, zone by zone, timed to periods when residents can be moved out of that zone temporarily — during group activities in the day room, or physiotherapy sessions.
The team placed particular emphasis on safety, because this is a setting with residents who cannot move themselves. Movement had to be planned carefully, treated zones clearly secured with notices posted, and ventilation completed for the specified period before residents returned.
Within three months, no family had moved a relative out citing the smell. What convinced Patcharee most was that three families who had previously complained told her, unprompted, that walking in now felt noticeably different.
The real damage
The quality of life of residents living in the building around the clock
This is the dimension that matters most and has nothing to do with money. Many bed-bound residents cannot express how they feel, yet they are in that environment every hour of every day — a responsibility a care home cannot avoid.
Lost income and its effect on staffing
Nine residents leaving equates to roughly 2,700,000 baht a year, which for a 40-bed home affects cash flow and the ability to employ registered nurses — the heart of care quality.
Reputation travelling through word of mouth and hospital referrals
Elderly care runs almost entirely on word of mouth and referrals from hospitals and social workers. Families leaving and citing a smell will tell others, which directly affects new admissions.
Morale among nurses and care assistants
Staff who work devotedly and are praised by families for their care then watch residents they have looked after for months moved out for a reason they cannot fix — deeply demoralising in a profession where good people are already hard to find.
Why the usual fixes fail
Mopping and wiping more frequently
Necessary and worth doing, but it addresses only surfaces a hand can touch, while the odour accumulates in the foam inside mattresses, in bed curtains, in wheelchair cushions and in the air conditioning — none of which wiping reaches.
Air fresheners and fragrance products
These mask for a few hours and are inappropriate in a setting where many residents have respiratory conditions. Strong fragrance can worsen symptoms for some residents, and families generally read it as an attempt to cover rather than fix.
Replacing all the mattresses
It addresses part of the problem but costs a great deal multiplied across 40 beds, and it does nothing about odour in bed curtains, wheelchair cushions, bathrooms and the air conditioning — so new mattresses reabsorb it from the environment before long.
Opening windows to ventilate
Only possible to a limited extent in an elderly care setting, because temperature must be controlled and resident safety considered. In hot and rainy seasons, opening windows brings in heat and humidity that affect residents directly.
Servicing the air conditioning alone
Necessary and worth doing on schedule for every unit, but insufficient, because the odour does not originate only in the air conditioning. It comes from mattresses, curtains, cushions and bathrooms, and will be drawn back into the system after servicing if the sources are not addressed.
The odour comes from several sources at once, so the whole building has to be treated
What the team showed Patcharee, and what changed how she thought about it, is that odour in an elderly care home never comes from one source. It comes from mattresses, bed curtains, wheelchair cushions, bathrooms, the laundry and the air conditioning, accumulating together and spreading throughout the building.
When the odour comes from several sources and has spread everywhere, addressing one point at a time can never cover it — and replacing only some items does not last, because the new items reabsorb odour from the environment.
Ozone is a gas, so it fills the volume of the space and penetrates every porous material at once: the foam inside mattresses, curtain fabric, wheelchair cushions, bathroom crevices and the air conditioning ducting. That matches the shape of this problem precisely.
Equally important for a care setting, ozone acts on the micro-organisms causing the odour rather than masking it — so it addresses environmental hygiene at the same time, which is what an elderly care home cares about most.
10 reasons ozone disinfection service solves it
1. The gas fills the space and reaches every odour source at once
Odour in a care home comes from mattresses, bed curtains, wheelchair cushions, bathrooms and the air conditioning simultaneously. Being a gas, ozone reaches all of them at the same time — unlike point-by-point cleaning, which can never cover it all.
2. It reaches the foam inside mattresses, where wiping cannot
Bed-bound residents spend all twenty-four hours on the same mattress, so organic matter and moisture soak into the foam inside far faster than in ordinary accommodation. That is a layer wiping and changing linen cannot reach — but a gas penetrates it.
3. It acts on the micro-organisms causing the odour rather than masking it
For a setting caring for people with lower immunity than the general population, addressing the environmental micro-organisms means more than masking a smell, because it is environmental hygiene work at the same time.
4. No residue in a space residents occupy continuously
Ozone reverts to oxygen once the process ends, so there is no residue on mattresses or in the air residents breathe — critically important for a group where many have respiratory conditions and are more sensitive than the general population.
5. It does not wet mattresses or materials, so there is no drying time
Washing or spraying with liquids leaves mattresses and cushions wet, and they dry very slowly in an air-conditioned building, risking more mould and requiring residents to be away from their beds for long periods. Gas treatment leaves nothing wet.
6. It can be done zone by zone, so residents do not have to leave the building
The team plans treatment one zone at a time, timed to periods when residents are already out of that zone — during group activities or physiotherapy — so daily care is not disrupted and residents are not moved more than necessary.
7. It reaches bathrooms, the laundry area and drains
Major odour sources in a care home are the bathrooms and laundry, particularly crevices and drains where moisture is permanently present. Routine cleaning reaches only part of that; gas treatment reaches the rest.
8. It reaches the air conditioning that spreads odour through the building
In a building running air conditioning almost constantly, the system is what carries odour from one point throughout the whole building. Gas treatment reaches the ducting and the parts servicing cannot, and is best done after the system has been serviced.
9. A professional team plans the safety procedure around residents' needs
An elderly care home has residents who cannot move themselves, so movement and zone closure need particularly careful planning. The World Health Disinfection team follows the safety procedure every time — securing the zone, posting notices, and ventilating before residents return.
10. It can be scheduled regularly and communicated to families
With a regular schedule and a record of every application, the home can tell families it manages the environment systematically — something families weigh heavily when deciding, and a differentiator most other homes still do not have.
Before the ozone service
- 9 families moving relatives out within six months
- 7 of the 9 citing the smell in the building
- Roughly 2,700,000 baht a year in lost income
- Daily cleaning to standard, with the smell still present
- Four odour sources found accumulating together and spreading through the building
- Nursing staff demoralised by a problem they could not fix themselves
After the ozone service
- No family moving a relative out citing the smell since
- Three families who had complained saying, unprompted, that it feels noticeably different
- Zone-by-zone treatment with no disruption to daily care
- Every air conditioning unit serviced, with a regular servicing schedule set
- A record of every treatment, used when talking with families
- Nursing staff morale lifted by more positive feedback from families
The service in 3 steps
1. Survey the building and identify every odour source
The team walks every area — resident rooms, mattresses, bed curtains, wheelchair cushions, bathrooms, the laundry, drains, the linen store and the air conditioning — then determines which sources can be addressed through routine work and which require treatment.
2. Complete the routine work first, then treat zone by zone
Increase bed curtain laundering, switch to doormats that wash frequently, clean drains on a schedule, and service every air conditioning unit first. Then apply ozone zone by zone to deal with everything remaining in one operation.
3. Plan the safety procedure and set a regular schedule
Treat one zone at a time during periods when residents are already out of it, secure the zone clearly with notices posted, and ventilate for the specified period before residents return. Then set a regular schedule and record every application for communication with families.
From a real client
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The four odour sources every care home team should know
The first is mattresses and seat cushions, the largest source in any elderly care setting, because bed-bound residents spend all twenty-four hours on the same mattress, so moisture and organic matter soak into the foam far faster than in ordinary accommodation. Changing linen and using protective covers helps but does not address the layer inside.
The second is other porous materials routinely overlooked in daily cleaning: bed curtains, wheelchair cushions, pillows, blankets, doormats and day room chair upholstery. These need a defined laundering or cleaning cycle separate from daily routines.
The third is the bathrooms and laundry area, particularly crevices and drains where moisture is permanently present, plus the store for used linen awaiting laundering — where odour concentrates most and which is often near the route families walk.
The fourth is the air conditioning system, which in a building running it almost constantly distributes odour from every source throughout the building. That is why the smell is not confined to its origin but is perceptible from the first step inside — and why the system must be serviced strictly on schedule.
Why odour is especially sensitive in elderly care
The lesson Patcharee stresses most is that in this business families do not decide on reason alone. They decide through the guilt of leaving a parent in someone else's hands — a feeling already present from the day they made the decision.
Smell triggers that feeling directly and immediately, because it is perceived in the first second of walking in and instantly conjures the picture of a parent living with it during all the hours the family is not there.
This is why so many families say they have no complaint about the care yet still move their relative out — which sounds contradictory to a manager, but is immediately understandable from the perspective of an adult child who goes home and cannot sleep.
Conversely, a clean, odour-free environment is worth more than any figure suggests, because it reduces that guilt and lets families feel confident in their own decision — which is what keeps them with the home over the long term.
Frequently asked questions
Is ozone treatment safe in a building with elderly residents?
Yes, following the procedure: there must be no people or animals in the zone being treated. The team plans zone-by-zone work timed to when residents can be out of that zone, secures it with notices posted, and ventilates for the specified period before residents return.
Do all residents have to leave the building?
No. The team works zone by zone, choosing periods when residents are already out of that zone as part of their routine — group activities or physiotherapy — so residents are not moved more than necessary and daily care is unaffected.
Is there residue on mattresses or in the air?
No. Ozone reverts to oxygen once the process ends. After ventilating for the specified period there is no residue — critically important for residents, many of whom have respiratory conditions and are more sensitive than the general population.
Will mattresses or materials get wet or be damaged?
Neither, when parameters are set to suit the materials. That is a major advantage over liquid spraying, because a wet mattress dries very slowly in an air-conditioned building and risks producing more mould.
How often should it be done?
The first round clears long-accumulated odour and may need more than one cycle. After that, set a regular schedule based on bed numbers, residents' dependency levels and the building — the team will recommend an interval after assessing the site.
Should the air conditioning be serviced first?
Yes, for the best result. In a building running air conditioning almost constantly, the system is what spreads odour throughout. Servicing removes the deposits first, and treatment then handles what servicing cannot reach.
Does it work for other care settings?
Yes. The same principle applies to nursing homes, rehabilitation centres, long-term care facilities, small hospitals and residential homes for older people — all air-conditioned buildings full of porous materials and occupied continuously.
How is pricing assessed?
On the area, the number of zones required, the severity and the frequency needed. The World Health Disinfection team always surveys the site and quotes with a working plan that does not disrupt resident care before starting.
I have no complaint about the care — but I cannot sleep
That family member's sentence explains the elderly care business more deeply than any figure, because it says families do not decide on care quality alone. They decide through the guilt of leaving a parent in someone else's hands.
Smell triggers that feeling in the first second a family walks in, and it is something the nursing team cannot fix by caring better — because it is a problem of the environment, not of the care.
And above all the business considerations sit the residents themselves, in that building twenty-four hours a day, many unable to say how they feel. Looking after the environment as well as it can be looked after is therefore not marketing. It is part of the care the home promised on the first day.
Talk to the World Health Disinfection team about a site assessment and an ozone treatment plan for your care home, scheduled so it never disrupts daily care.
See the ozone disinfection service and pricing — click here
Call 065-556-6294 or add LINE @whd268
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