Once you have gotten rid of the cockroaches, the question that matters is: how do you keep them from coming back? Prevention is far cheaper and easier than treatment, and it relies on cutting off what cockroaches need: food, water, shelter and entry. This guide gives you practical steps to carry out once and then maintain.
The idea: Preventing cockroaches means cutting off their food, water and shelter, not waiting for them to appear and then spraying.
Food: Crumbs and grease behind appliances and in the kitchen, and uncovered pet food, attract them every day.
Water: Leaking pipes and moisture under the sink and air conditioner let them survive for weeks.
Entry points: Cracks, drains and pipe openings are their routes in, so seal them and cover drains at night.
Rule: Daily kitchen cleanliness plus preventive gel in hidden places keeps them away better than spraying after an infestation.
1. Seal entry points and cracks
Cockroaches pass through openings only a few millimeters wide.
- Fill cracks around pipes, conduits and cables entering through walls with silicone or a suitable filler.
- Repair cracked tiles and open corners behind sinks and cabinets.
- Install a door sweep under doors, and screens on windows and vents.
- Seal the openings between apartments around shared pipes in apartment buildings.
2. Cut off the water
- Fix any leak under sinks and in the bathroom right away.
- Dry sinks and surfaces at night before going to bed.
- Drain air conditioner and refrigerator water away from the house.
- Pour water down unused drains weekly, and cover exposed drain openings.
3. Practical kitchen hygiene
- Empty the trash daily and use a tightly closed bag and a lid.
- Wash dishes before bed and do not leave them in the sink.
- Wipe crumbs and grease around the stove and behind appliances weekly.
- Pick up pet food at night.
- Clean the floor under the refrigerator and stove from time to time.
4. Store food tightly
Airtight plastic or glass containers protect sugar, rice, legumes and grains. Avoid leaving fruit uncovered or bread cartons on countertops.
5. Inspect what you bring into the house
One of the most common causes is that cockroaches come in with what we buy:
- Open grocery, water and drink cartons outside the kitchen, and dispose of the cardboard quickly.
- Inspect used appliances and furniture before bringing them in.
- Check bags and storage boxes after travel.
- Do not stack cartons and newspapers; they are an abundant hiding place.
6. Watch the drains and outdoor areas
- Take care of rain drainage and damp surfaces around the building.
- Keep woodpiles, leaves and debris away from the walls.
- Clean trash bins, close them tightly and keep them away from the entrance.
Large species such as the American cockroach and the Oriental cockroach sometimes reach your home from outside, so set up a protective barrier at entrances.
7. Monitor with glue traps
The best early-warning sign is two or three traps under the sink and behind the refrigerator, checked by a household member every two weeks. If one or two cockroaches show up, find where they are and act early; do not wait until they multiply. And review the signs of a cockroach infestation to understand what everything you find means.
8. Preventive gel in sensitive spots
In apartments where infestations keep recurring because of neighbors, you place small dots of gel at pipe entry points and behind appliances, which protects your home from any cockroach that sneaks in. This does not replace sealing entry points, but it is an extra line of defense.
If an infestation does occur, follow the plan in getting rid of cockroaches for good.
A short maintenance schedule
- Daily: Empty the trash, wash the dishes and dry the sink.
- Weekly: Wipe up grease and pour water down unused drains.
- Every two weeks: Check the traps and open cartons.
- Every three months: Review cracks, leaks and preventive gel spots.
Products for prevention and monitoring
- Catch Master American glue trap, ready to use for mice and crawling insects, 72 glue boards: Glue traps for early warning at entrances and under sinks.
- Advion cockroach gel, 30 g: Advion gel (indoxacarb 0.6%) in small preventive dots behind appliances and at pipe entry points.
- Economy pack for controlling German cockroaches at home: An economy pack suited to maintenance in apartments.
- Cockroach gel section: All our international gels in one place.
Frequently asked questions
How do I keep cockroaches out of my home?
By sealing cracks around pipes and doors, fixing leaks, storing food tightly and inspecting cartons before bringing them in.
Do vinegar or herbs keep them away?
Not on their own. They may repel some temporarily, but they do not treat the source or kill the colony.
Do glue traps work by themselves?
For monitoring, yes; for eliminating an infestation, no. Use them as an early warning and to measure results.
How often should I inspect the house?
Every two weeks for the traps, and every three months for cracks and leaks.
The cockroaches come from my neighbors. What should I do?
Seal the openings around pipes and doors, put preventive gel at entry points, and coordinate with the neighbors if possible.
Does leaving the light on keep them away?
No. They hide in cracks during the day and come out when the place goes quiet.
Image source: Dimitǎr Boevski — Wikimedia Commons (CC BY-SA 4.0)
FAQ about cockroach prevention
Where do cockroaches enter the house from?
Usually through drain openings, cracks around pipes, under doors and windows, and in cartons and bags brought from infested places.
What places attract them most?
The kitchen, bathroom, under sinks and behind appliances, because of the food, water, warmth and darkness available there.
Is cleanliness alone enough?
It is the foundation of prevention, but it may not be enough if there are open entry points or an existing infestation, so you need to seal cracks and use a suitable gel or bait as well.
How long does it take for control results to show?
Results usually begin within days and need weeks of follow-up, because new eggs hatch after treatment, so it is best to repeat inspection and spot treatment.