Why professional help works for cockroach control

Why finding the hiding places matters

The insects running across the counter are only part of what needs looking at. Behind the fridge is one of the main places I check, along with cupboards and the microwave area. I also look for open food packets, because the inspection needs to establish where the insects shelter and what they are feeding on.

The kick plate is the panel along the bottom of fitted cupboards. Behind it can be a large, dark cavity where cockroaches shelter before coming out to feed. It can be missed if all the attention goes on shelves and counters. Recesses around built-in stoves and ovens can need checking too, where there is access.

A description over the phone helps, but I inspect before choosing treatment. German cockroaches are usually the kitchen problem I find. Bigger cockroaches can mean checking other places, including drains and damp subfloors. The last place someone saw one run past doesn't tell us the whole extent of the problem.

What does flush and vacuum achieve?

I have the vacuum cleaner ready before flushing cockroaches from their hiding places, so I can collect them as they emerge. I also vacuum accessible hiding areas and egg cases, which are called oothecae.

That physically removes what we can reach before baiting. A recess we can't reach needs discussing so it is clear what we have been able to cover. Simply adding more spray doesn't do that removal work.

Why might a bait need changing?

We use different baits and check how the cockroaches respond. If they're not eating one, that isn't automatically proof of insecticide resistance. It can mean the bait isn't being accepted, so seeing what happens to it matters when deciding what to use next.

Any flushing or spray work also needs to fit the bait and the product instructions. Contaminating the bait can work against what we're trying to do.

Why check again after a week?

The return lets me compare activity, see whether the bait is still there or has been eaten, and decide where more attention is needed. We've had very bad infestations where all the bait was eaten within three days and we had to put more down. A heavy infestation can need more work than a smaller, concentrated kitchen problem.

An untreated neighbouring flat can keep introducing cockroaches. I also assess routes around doors, windows and, where permitted, shared outside areas. A live cockroach that has just walked in doesn't tell the same story as large numbers still living inside the kitchen.

If the building can't be dealt with more broadly, treatment may mean managing the problem from your side. Knowing whether we are seeing incoming insects, an active indoor infestation or both helps us decide what to do next.