Most people assume roaches in the bathroom mean they’re not cleaning enough, but the truth is far more unsettling: these insects are often commuting through shared plumbing, using your shower drain as a doorway. The warm, damp air rising from your pipes acts like a beacon, drawing them upward. By turning a basic party balloon into a snug, flexible seal under the drain cover, you quietly shut that door without disrupting water flow or daily use.

This small hack becomes far more powerful when you pair it with a drier bathroom and sealed gaps around pipes or tiles. Every wiped-down surface, every crack filled with silicone, removes another invitation for pests to settle in. Instead of harsh chemicals or expensive gadgets, you’re using simple physics and a few minutes of effort to reclaim your space from something that never should have been sharing it.