A Two-Screen, 380-Seat Cinema Lost Half Its Audience Because the Fabric Seats Smelled Musty and Vacuuming Would Not Fix It
Last updated: 7 Sep 2026 | 4 Views |
A true story from a two-screen community cinema in northern Thailand
A Two-Screen, 380-Seat Cinema Lost Half Its Audience Because the Fabric Seats Smelled Musty and Vacuuming Would Not Fix It
When the smell an audience notices in the first ten seconds is the reason they never come back — and vacuuming is not the answer
A two-screen, 380-seat community cinema in a northern province lost nearly half its audience in a year, despite showing the same films as the mall multiplexes at half the price. The real cause was musty odour from the fabric seating that vacuuming could not remove. Here is how ozone disinfection solved it without replacing a single seat.
Kriengkrai, 47, owns a two-screen community cinema of 380 seats in a northern provincial town. It has operated for 16 years, showing the same films as the mall multiplexes at roughly half the price, and is well known locally.
Last year attendance fell from an average of about 210 a day to about 115 within twelve months — with no price increase, the same films, and no new cinema opening in town.
What led Kriengkrai to the cause was standing at the auditorium door and watching how people reacted as they walked in. He saw several wrinkle their noses or cover them within the first ten seconds — something he had never noticed in 16 years.
The first ten seconds, when the audience decides
Kriengkrai says he had become so used to the smell in the auditorium that he could not detect anything at all — normal for anyone in a place every day. But someone walking in from outside registers it within seconds.
He asked several regular customers he knew well, directly, and got almost identical answers: a musty smell. Some described it as clothes that had not dried properly, others as a room shut up for a long time, and one told him plainly that he had brought his child, who said it smelled bad.
What shocked him most was that several regulars said they had felt this for a long time but had not liked to say — out of politeness, and because they assumed it was simply what an old cinema is like. Which means the problem long predated the fall in attendance.
He also found a very high proportion of first-time visitors never returning, which explains why attendance declined gradually rather than collapsing: he was losing customers one at a time, continuously.
Why cinema seating holds so much odour
Kriengkrai consulted a cleaning specialist and finally understood the problem. Cinema seating is a highly porous material with foam inside, which absorbs moisture and organic matter from the audience continuously.
In one day, several audiences sit on the same seat, each leaving perspiration, skin oils, food debris and moisture from their breath in the upholstery. Accumulated over years without anything deeper than vacuuming, this becomes food for bacteria and mould.
What makes it worse is that an auditorium is a sealed, air-conditioned space that is dark at all times, with no sunlight and limited ventilation — ideal conditions for mould growth, particularly during the hours it sits closed between screenings.
The specialist also pointed out that the problem is not the seats alone. It is in the carpet, the acoustic curtains, the wall acoustic panels and the air conditioning system — all porous materials holding odour in the same way.
The arithmetic that made him act immediately
Attendance falling from 210 to 115 a day equates to roughly 3,400,000 baht a year in lost ticket revenue — several times the cinema's whole-year profit in a good year.
But the damage does not stop at tickets. Popcorn and drinks, which carry a far higher margin than tickets, fall with the audience — and in a small cinema that is where the actual profit sits.
A cinema's fixed costs barely change with attendance: licensing, electricity for the projector and air conditioning, and staff wages. So when the audience halves, profit falls by considerably more than half.
Kriengkrai considered replacing all the seating, but the quotations came to several million baht and would require closing for several weeks — neither of which a cinema in that condition can absorb.
What the cinema did, and the result in two months
Kriengkrai asked the World Health Disinfection team to assess the site. They surveyed both auditoriums along with the foyer and projection rooms, and showed him the problem was not confined to the seats but distributed across every porous material in the building.
They proposed ozone treatment of the whole auditorium volume overnight, after the last screening — a period when the auditorium is already empty of both audience and staff, so the cinema never has to close and not a single screening is affected.
What the team emphasised was treating the entire volume rather than just the seating area, because odour also sits in the carpet, the acoustic curtains, the wall panels and the air conditioning system — and that it should follow servicing of the air conditioning for the best result.
Within two months attendance was back to an average of about 190 a day. What gave Kriengkrai the most confidence was not the number. It was standing at the auditorium door again and no longer seeing anyone wrinkle their nose on the way in.
The real damage
Half the audience gone, with fixed costs unchanged
A cinema's costs barely move with attendance: screening licences, electricity for the projector and air conditioning, and staff wages. When the audience halves, profit falls by much more — roughly 3,400,000 baht a year in lost ticket revenue alone.
Popcorn and drinks, where the real profit sits
In a small cinema, food and beverage carries a far higher margin than tickets and is where the actual profit is made. Fewer people through the door reduces that revenue proportionally, so the effect on profit is heavier than the ticket figures suggest.
First-time visitors who never return
The proportion of first-time visitors who never came back was very high, which explains why attendance declined gradually rather than collapsing — customers were lost one at a time, continuously, without the owner realising.
The health of staff who are in the building all day
Projectionists, cleaners and box office staff are inside the same building all day. Working in a space with accumulated mould in the materials genuinely affects the respiratory system, particularly for staff with allergies.
Why the usual fixes fail
Vacuuming the seats daily
Necessary and worth doing, but it addresses only dust and debris on the surface, while the cause of the odour is organic matter and micro-organisms that have soaked down into the foam inside the seat — which a vacuum cannot reach.
Spraying deodoriser before each screening
It masks for a few hours, and once the audience is seated and the upholstery warms up, the original odour returns mixed with the spray — which many people say is worse. Audiences with allergies also react to the fragrance itself.
Wet-extraction cleaning of the seating
This soaks the upholstery, which then takes a very long time to dry in an air-conditioned room with no sunlight and limited ventilation. If it does not dry completely it produces more mould and worse odour — something many venues have experienced.
Replacing all the seating
It genuinely works, but costs several million baht and requires closing for weeks — neither of which a venue already losing revenue can absorb. And it does not address odour in the carpet, curtains, acoustic panels and air conditioning, so new seats reabsorb it before long.
Increasing the air conditioning capacity
It makes the room colder but removes no odour — and if the air conditioning system itself holds accumulated odour, more capacity simply blows more of it into the room, making the problem more obvious rather than better.
The odour is in every porous material in the room, so you have to treat the whole volume
What kept cinema owners solving the wrong problem for years is assuming it is the seats. In fact the odour is in every porous material in the auditorium: the seating, the floor carpet, the acoustic curtains, the wall acoustic panels and inside the air conditioning.
When the problem is distributed through the whole volume of the room, any method treating one surface at a time can never cover it — and replacing only the seats does not last, because new seats reabsorb odour from everything else.
Ozone is a gas, so it fills the auditorium's volume and penetrates every porous material at once: the foam inside the seats, the carpet fibres, the acoustic panels and the air conditioning ducting. That capability matches this problem exactly.
An equally important advantage for a cinema is that it can be done overnight after the last screening, when the auditorium is already empty — so there is no need to close and not a single screening is affected.
10 reasons ozone disinfection service solves it
1. The gas fills the auditorium volume and reaches every material at once
Odour in a cinema sits in the seating, carpet, acoustic curtains, wall panels and air conditioning simultaneously. Being a gas, ozone reaches all of them at the same time — unlike surface-by-surface cleaning, which can never cover it all.
2. It reaches the foam inside the seats, where a vacuum cannot
The cause is organic matter and micro-organisms that have soaked into the foam inside the seat — a layer no vacuum or surface wipe can reach. As a gas, ozone genuinely penetrates to that layer, treating the cause rather than the symptom.
3. It does not wet the upholstery, so there is no drying time
Wet extraction soaks the seating, which dries very slowly in a dark, air-conditioned room, and incomplete drying produces more mould. Gas treatment does not wet the upholstery at all, so that risk does not exist and the room can be used again quickly.
4. It can be done overnight after the last screening, with no closure
For a cinema, closing means immediate lost revenue. Ozone treatment can be carried out overnight after the final screening, when the auditorium is already empty of audience and staff — so not a single screening is affected.
5. Vastly cheaper than replacing all the seating
Reseating an auditorium costs several million baht and requires weeks of closure, while ozone treatment costs far less and requires no closure at all. For a business already under revenue pressure, that is the decisive difference.
6. It addresses the mould causing the odour, rather than masking it
Deodorising sprays work at the endpoint by masking. Ozone acts on the micro-organisms and mould producing the odour, so it does not return the moment the upholstery warms up under an audience the way sprayed odour does.
7. It reaches into the air conditioning system and ducting
Part of the odour sits inside the air conditioning and ducting, and every time the system runs it is blown back into the room. Gas treatment reaches that part, and is best done after the system has been serviced.
8. No residue in a space audiences sit in for hours
Ozone reverts to oxygen once the process ends, so there is no residue on the seats people sit on or in the air they breathe — quite unlike products that leave both fragrance and chemical behind in a sealed space.
9. A professional team sets parameters suited to the venue's volume
The right concentration and duration depend on the auditorium volume, the materials involved and the severity. An experienced team assessing the site matters especially for large sealed spaces containing many different materials.
10. It can be scheduled regularly so the problem does not build again
Once years of accumulation have been cleared, a regular treatment cycle stops it recurring — at far lower cost than letting it build up again and having to deal with it in one large intervention.
Before the ozone service
- Attendance down from an average of 210 a day to 115 in one year
- Roughly 3,400,000 baht a year in lost ticket revenue
- Audiences visibly reacting within the first ten seconds of entering
- Regular customers saying they had noticed for a long time but not liked to say
- A very high proportion of first-time visitors never returning
- Reseating quotations of several million baht and weeks of closure
After the ozone service
- Attendance back to an average of about 190 a day within two months
- Nobody reacting to the smell on the way in any more
- Popcorn and drinks revenue recovering with the audience
- No closure and not a single screening affected
- No reseating required, saving several million baht
- A regular treatment cycle set so the problem does not build again
The service in 3 steps
1. Stand and watch how customers react in the first ten seconds
The fastest and cheapest way to know whether your venue has an odour problem is to stand at the entrance and watch people coming in from outside — because owners and staff who are there every day stop noticing entirely, while a newcomer registers it immediately.
2. Have the team assess the whole volume, not just the seats
The team surveys the entire auditorium including carpet, acoustic curtains, wall panels, foyer and air conditioning, then sets parameters suited to the volume and materials, and will advise servicing the air conditioning first for the best result.
3. Treat overnight after the last screening, then set a regular cycle
Carry out the work after the final screening when the auditorium is already empty, securing the area and posting notices with nobody present, then ventilate for the specified period before the first screening the following day. Then set a regular cycle so odour does not accumulate again.
From a real client
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Why the owner is always the last to know their venue smells
What happened to Kriengkrai has a clear physiological explanation. The human olfactory system adapts and reduces its response to a continuously present odour within minutes, so anyone in a place every day stops perceiving it entirely, while someone entering registers it at once.
This is why owners and staff are almost always the last to know their venue has an odour problem, and why the issue is typically left unaddressed for years — until it shows up in the business numbers.
Three practical ways to check: first, leave the premises for at least thirty minutes and walk back in, which restores your perception close to an outsider's. Second, stand and watch how customers react in their first ten seconds.
Third, and most direct, ask regular customers you know well, straightforwardly, saying you genuinely want to know rather than to defend yourself. Kriengkrai says this gave him his answer fastest, and left him regretting he had not asked years earlier.
Other businesses with sealed spaces and porous materials
The same problem occurs in any business with a sealed, air-conditioned space full of porous materials. Hotel meeting and conference rooms are a clear example, combining carpet, upholstered chairs, curtains and acoustic panels, and often shut up for days between events.
Karaoke rooms and banqueting rooms have it worse still, because on top of the porous materials they accumulate cigarette, food and drink odours in the same fabrics — and they are equally businesses where customers decide on how the first minute feels.
Music rehearsal rooms and recording studios are another overlooked group, because the walls are lined with acoustic foam, an extremely porous material that absorbs both moisture and odour particularly well and cannot really be cleaned by conventional means.
The principle applying to all of them is that a sealed, air-conditioned, sunless space full of porous materials accumulates odour slowly enough that the owner never notices — and fixing it requires treating the whole volume rather than one surface at a time.
Frequently asked questions
How many days do we have to close?
None. The work is normally carried out overnight after the final screening, when the auditorium is already empty, with ventilation for the specified period before the first screening the next day — so not a single screening is affected.
Will the seating or other materials be damaged?
Not when carried out by a team setting the concentration and duration to suit the materials. Unlike wet extraction, which soaks the upholstery and risks more mould if it does not dry completely, gas treatment leaves nothing wet.
Is there residue on the seats people sit on?
No. Ozone reverts to oxygen once the process ends. After ventilating for the specified period there is no residue on the seating or in the air — a significant advantage in a sealed space where people sit for hours.
Should the air conditioning be serviced first?
Yes, for the best result, because part of the odour accumulates in the coil and ducting. Servicing removes the deposits first, and the gas treatment then handles what servicing cannot reach.
How often should it be done?
The first round clears years of accumulation and may need more than one cycle. After that, set a regular schedule based on usage intensity and climate — the team will recommend an appropriate interval after assessing the site.
Is it really better value than reseating?
Clearly better in most cases, because reseating costs several million baht and weeks of closure, while treatment costs far less and requires none. And new seats will reabsorb odour from the carpet and curtains anyway unless the whole room is treated.
Does it work for other kinds of space?
Yes. The same principle applies to meeting and conference rooms, karaoke rooms, banqueting rooms, rehearsal rooms, recording studios and libraries — all sealed, air-conditioned spaces containing many porous materials.
How is pricing assessed?
On the volume of the space, the materials involved, the severity and the frequency required. The World Health Disinfection team always surveys the site and quotes with a working plan that does not disrupt your operating hours.
What you cannot smell is what your customers smell in the first second
The most direct lesson here is that our sense of smell adapts until we no longer perceive what we live with daily — which is why owners are almost always the last to know their venue has a problem.
Standing at the entrance and watching people's faces takes less than an hour, but it answers a question a whole year of revenue figures never did. Every business with a sealed space should do it at least once a year.
And when you find the problem, the answer does not have to be a large capital outlay. Treating the cause with a method that reaches every material at once usually works better, and costs incomparably less, than replacing everything.
Talk to the World Health Disinfection team about a site assessment and an ozone treatment plan for your cinema, conference room or sealed air-conditioned space.
See the ozone disinfection service and pricing — click here
Call 065-556-6294 or add LINE @whd268
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