You don’t always see the full roach. Look for the clues. If you notice small, dark droppings around the drain rim, that’s roach poop. Or maybe a weird, musty smell coming from the sink that doesn’t go away after cleaning. That’s their party fragrance.
Also, check your dishwasher hose. It usually connects to the sink drain, and roaches love that warm, moist path. If you see a roach scurry under the dishwasher after you run it, you’ve got a pipe party going on. (You’re welcome for that mental image.)
How to Kick Them Out of Your Plumbing
First, do not pour bleach down the drain. It’s harsh, damages pipes, and only kills the roaches on contact—it doesn’t stop the next wave. Instead, try a sink trap cover. These are cheap mesh or metal inserts that sit in the drain opening. They let water through but block roach legs. I bought a pack of three for under ten bucks. Best investment ever.
Second, seal every tiny gap around your pipes. Where the drain pipe meets the wall, there’s usually a big open hole. Fill that with steel wool and caulk. Roaches hate steel wool—it cuts their feet. They might be armored, but they hate a paper cut as much as you do.
Got roaches? Experts say this is the one common liquid you should never
Third, run hot water once a week. Not just warm—hot. Like, boiling kettle water mixed with dish soap. The soap breaks the surface tension, so they drown faster. But honestly, the real trick is eliminating the food source in the pipes. Use a drain brush or pour baking soda and vinegar to clear out that gunk. No buffet, no roaches.
