Does Using Bleach Exterminate Roaches?

I've Got Roaches Under the Sink—Can I Just Pour Bleach Down the Drain?

It's tempting, but bleach isn't a reliable roach killer. Yes, bleach can kill roaches if they're fully submerged or drenched long enough, since it's corrosive and damages their exoskeleton. In practice, though, roaches rarely sit still that long. Its strong odor actually repels them, sending them scattering deeper into wall voids and cracks.

Pouring bleach down the drain is a common DIY fix, but it's mostly ineffective. The bleach dilutes and flushes away too quickly to eliminate a nest hidden in your pipes, so roaches simply return once the smell fades. Worse, mixing bleach with ammonia-based cleaners can release toxic fumes, and repeated use can damage older plumbing.

While bleach may kill the occasional roach, it doesn’t reach the hidden colony, the egg cases, or the source of the infestation. To flush a roach from a drain, other methods work better: fill the sink fully, then release the stopper so rushing water scours the pipe; or pour ½ cup baking soda and ½ cup white vinegar down the drain, cover it, and chase with boiling water.

Seeing roaches often means there are many more hidden. Contact Gregory Pest Solutions today to schedule your free inspection.