For a pest control contractor, a fogger is not merely equipment. It is the tool clients use to judge the quality of the work from the first second they watch it running.

The easiest thing for a client to observe is spray range — how far the mist travels, whether it reaches the eaves, whether it covers high corners. When the range shortens, clients notice immediately that 'the work is not what it was'.

This article tells the true story of a mid-sized pest control firm that nearly lost an annual factory contract to a pressure loss problem, and explains where the pressure goes and how to find it.