I’m seeing more cockroaches since I treated. Is it working?

It depends on what you used. Two different things look the same from the outside. Bait can bring cockroaches out into the open for a short while, often slow, sluggish or dying. Spray can drive healthy ones away from the treated rooms into rooms they never used before. The first means it is working. The second means the plan needs changing.

When more is a good sign

Gel bait works through the hiding places. Cockroaches eat it, go back, and share it with the others. While that happens, you may see more of them out in the open than usual, including in daylight.

• They move slowly, stagger, or lie on their backs.
• You find dead ones near the bait and along walls.
• The bait dots are shrinking. They are eating it.
• Over the following weeks, the trap counts drop, and young ones show up less.

When more is the spray scattering them

Many surface sprays repel cockroaches as well as killing the ones they touch. Spray the kitchen and the bathroom, and the survivors look for somewhere new: the bedroom, the living room, a child’s room. That is what it looks like when they turn up fast and healthy in rooms where you never saw them before.

The fix is to stop spraying, especially anywhere near bait, because the residue puts them off it. Put bait and a trap in each new room, following the label, and let the bait do the work. Our answer on why spray does not end it explains the switch in full.

Sticky traps measure, they do not fix

A trap full of cockroaches every night is alarming, and it does tell you something true: there are a lot. But traps will not end an infestation. They catch the ones wandering past. The breeding happens in the hiding places, out of reach of a sticky card. Changing traps daily and counting the catch is useful information. It is not the treatment.

Keep the traps as your measuring tool, and put the effort into gel bait in the hiding spots and an insect growth regulator so the young cannot grow into breeding adults. For every product: follow the label, and check it is allowed where you live.

How to judge progress

1. Same traps, same spots. Number them and put each one back in exactly the same place. See how to use monitor traps.
2. Same day each week. Write down what each trap caught, adults and young ones apart.
3. Replace a trap when it is full or dusty, and put the new one in the same spot so the counts still compare.
4. Read the trend, not one night. A bumpy first week is normal. What matters is the direction over several weeks.

Seeing one young cockroach every few days is not nothing, but it is a number you can work with. Write it down. If it drops to none, good. If it holds or climbs, that is your answer too.

Kids and pets: sticky traps have no poison, but the glue grips fur and fingers. Bait and traps both go behind the fridge or inside cupboards, never on the open floor.

When to call a professional

Call one if you are still catching young ones after four weeks of bait and a growth regulator, or if the counts keep rising after the first couple of weeks. Bring the dated counts and say what you have used. If you rent, send the same to your landlord in writing. Our answers on DIY or a pro and when pest control is not working cover what to ask.