You bought the can, sprayed the baseboards, sprayed under the sink, maybe sprayed again a week later. For a few days the kitchen looked better. Then you flipped on the light at midnight and there they were again, small tan roaches running for the gap behind the stove.
If that sounds familiar, you’re not doing it wrong. A German roach spray not working is one of the most common reasons people around Crockett, Palestine and Huntsville call us. The problem isn’t how much you sprayed. It’s that spraying is the wrong tool for this particular roach. Here’s why, and what gets rid of them.
First, make sure they’re German roaches
East Texas has two very different roach problems, and they need different answers.
The big reddish-brown or dark roaches, the ones people call water bugs or tree roaches, live outside in mulch, leaf litter and tree holes. They wander in now and then. One in the bathroom doesn’t mean they’re breeding in your house.
German roaches are the other kind. Look for:
- Small size. About half an inch long as adults, with smaller wingless young ones mixed in.
- Tan or light brown color with two dark stripes running down the plate just behind the head.
- Where you see them. Kitchens and bathrooms, close to water, warmth and food: under the sink, behind the fridge, around the dishwasher, inside cabinet hinges, near the microwave and coffee maker.
- When you see them. Mostly at night. Seeing them in the daytime usually means the hiding spots are crowded.
German roaches don’t come in from the yard. They live and breed indoors, and they usually arrive as hitchhikers in a used appliance, a cardboard box, grocery bags or furniture, or through a shared wall in a duplex or apartment. Our cockroach ID page has photos if you want to compare.
Why the spray didn’t work
There are four reasons, and they stack on top of each other.
1. The spray only kills what it lands on. The roaches you see are a small share of the ones in the room. The rest are tucked into cracks, motor compartments, hinge gaps and wall voids where a can of spray never reaches.
2. The dried residue does very little. Most store-bought roach sprays are built on a family of insecticides called pyrethroids, and German roaches are well known for resisting them. In 2024, researchers at the University of Kentucky and Auburn University tested common consumer sprays on German roaches collected from real homes. The sprays worked when the roaches were hit directly, but roaches that only walked across a treated surface for half an hour mostly survived. The researchers’ conclusion was blunt: they expect these products to add little or nothing to German roach control. You can read the study summary on PubMed.
3. Spraying scatters them. Many sprays repel roaches as much as they kill them. Roaches steer around the treated spots and push deeper into the walls or into the next room. That’s how a kitchen problem turns into a kitchen, bathroom and laundry room problem.
4. They breed faster than you can spray. Each egg case holds dozens of young, and the female carries it tucked away until it’s nearly ready to hatch. Even a good night with the spray can is replaced within weeks.
Bug bombs and foggers have the same weakness. The mist settles on open surfaces and doesn’t get into the cracks where the roaches actually are.
What a German roach clean-out involves
German roaches need a different approach from regular pest control, which is why we treat them as their own job. A clean-out with us goes like this:
- Inspection first. We check the whole kitchen, the appliances, cabinet hinges, under the sinks and the bathrooms to find where they’re living and how far they’ve spread. The inspection is free, and you get a price before any work starts.
- Gel bait in the hiding spots. Small placements of professional gel bait go right where the roaches live: behind and under appliances, in hinge recesses and under the sink. Roaches come to bait instead of running from it. They feed on it, and it gets passed along to others back in the hiding spot.
- An insect growth regulator. This keeps young roaches from growing into adults that can breed, which breaks the cycle that keeps refilling your kitchen.
- Crack and crevice treatment. A targeted product goes into the gaps bait can’t cover, such as wall voids and around plumbing lines.
- Follow-up visits. We come back to freshen the bait, check what’s left and make sure the numbers are dropping.
You don’t have to leave the house for a gel bait treatment. We’ll tell you if there’s any short wait before you use a treated area, and we ask that pets stay off treated spots until they’re dry. More detail is on our German roach control page.
What to do between visits
Bait works best when it’s the easiest meal in the room. Your part matters as much as ours.
- Put the spray can away. This is the big one. Spraying over or near bait placements makes roaches avoid the bait and undoes the treatment.
- Cut off the food. Wipe counters and the stove top at night, don’t leave dishes in the sink, and keep pet food picked up after feeding time.
- Clean the grease. The sides of the stove, the range hood and the floor under the fridge are where roaches feed when the counters are clean.
- Cut off the water. Fix the drip under the sink, dry the sink at night and empty the pet water bowl before bed if you can.
- Take the trash out nightly and use a can with a lid.
- Clear the clutter. Stacked paper bags, cardboard boxes and full junk drawers are favorite hiding places.
- Leave the bait alone. Don’t wipe it off or clean around it with strong cleaners.
How long until you stop seeing them
Not overnight, and it’s better to know that going in. Bait takes time to move through the population, so you may still see roaches for the first week or two. You may even see a few more in the open at first, along with dead ones. That’s normal.
Most German roach clean-outs take two or three visits spread over four to six weeks. Heavy infestations can take longer. We don’t call the job done until a follow-up inspection shows they’re gone.
What you should see along the way is a steady drop: fewer at night, then mostly small ones, then none.
When to call instead of buying another can
Give us a call if:
- You’re seeing small roaches in the daytime.
- They’ve shown up in more than one room.
- You’ve sprayed more than once and they keep coming back.
- You share a wall with a neighbor who may have them too.
- You’ve just moved in, or brought home a used fridge, stove or furniture, and started seeing them.
- You run a kitchen, rental or other business where roaches can’t wait.
We’ll start by looking, not spraying. If it turns out to be an outdoor roach that wandered in, we’ll tell you that, and you may not need a clean-out at all. We serve homes and businesses across Houston County, including Grapeland, Lovelady, Latexo and Kennard, along with Palestine and Huntsville. See our roach control in Crockett or everything we do on the Crockett pest control page.
Frequently asked questions
I only see one or two roaches. Is it really an infestation?
With German roaches, usually yes. They hide well and come out at night, so a couple in the open generally means more behind the appliances and in the cabinets. An inspection will tell you how far it’s gone.
Will my regular pest control service take care of German roaches?
A regular plan covers the outdoor roaches that wander inside. German roaches need their own clean-out with bait and follow-up visits. It’s a separate, one-time job.
Do I have to empty my cabinets?
Not always. It depends on where the roaches are living. We’ll tell you after the inspection if any cabinets or drawers need clearing before treatment.
Is boric acid or a store-bought bait worth trying?
Store baits are a better idea than sprays, and for a very small problem caught early they can help. They fall short when the infestation is established, because placement, the amount of bait and follow-up are what decide the result.
Can German roaches come back after a clean-out?
They can be carried in again the same way they came the first time. Check used appliances and boxes before they come inside, and call early if you spot one.
Tired of spraying and still seeing roaches? Call Critter Gitters at 936-261-7965 for a free inspection. We’ll tell you what kind of roach you have and what it will take to get rid of it.
