Every cockroach treatment in a commercial kitchen eventually faces the same test: what happens at closing time. Pesticides wear off. Habits do not. The kitchens that stay clear between service visits are the ones where the closing routine removes what pests come in for — food residue, moisture and hiding places.
Dry the kitchen, not just clean it
First, wipe surfaces dry, not just clean. Cockroaches need water more than food, and a damp cloth left in a sink or a wet floor under the dish rack waters the whole harbourage overnight. Dry benches, dry sinks, dry floors at close of business.
Seal the food, all of it
Flour bags folded over, oil tins with lids off, garnish trays cling-filmed loosely — each one is a feeding station. Pest-proof storage means rigid containers with sealed lids, and nothing edible left in thin plastic on a low shelf.
The bin goes out every night
Empty the bin out of the building every night, and wash the bin itself weekly. A bin that smells of food undoes bait placements metres away, because cockroaches and rodents take the easier meal first.
Pull equipment out on a schedule
The space behind the fridge and under the fryer is warm, undisturbed and greasy — ideal harbourage. A weekly pull-out and clean of the worst gaps removes the shelters that sprays cannot reach.
Watch the delivery door
Cardboard boxes arrive with cockroach egg cases inside, and rodents test the same door gap nightly. Break down cartons outside the kitchen, and fit a door brush so the gap under the back door is closed.
None of this replaces a professional programme — gel baiting, drain treatment and monitoring do the heavy lifting. But the routine is what makes the programme last, and it costs nothing beyond the last twenty minutes of the shift.