Cockroaches need food, water and shelter — take those away and they move on. The most effective prevention is cutting off water, sealing food, closing the gaps they enter through, and removing the clutter they hide in. It's also what stops a treated infestation coming back.
Roaches can last a while without food but not without water. Fix dripping taps, dry sinks at night, wipe up condensation, and don't leave pet water bowls out overnight.
Store food in sealed containers, wipe benches and stovetops, sweep crumbs, empty bins, and clean under and behind appliances where grease quietly builds up.
Gaps around pipes, under doors, cracks in skirting and open drains are how they get in. Seal and screen them — American cockroaches in particular come straight up through drains.
Cardboard, paper bags, stacked clutter and damp corners are prime harbourage. Declutter kitchens, bathrooms and the garage especially.
Prevention is also what stops a professional treatment being undone — keep the habits going once you've cleared an infestation, or it just comes back.
For food, water, warmth and shelter — kitchens and bathrooms offer all four, which is exactly where you tend to see them.
Not necessarily. Even clean homes get them if there's water, gaps to enter, or they've come up through drains. Hygiene helps but isn't the only factor.
Some people use peppermint or bay leaves as a mild deterrent, but they won't clear or reliably prevent an infestation — cutting off water, food and entry points does far more.
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