Cockroaches are frequently attracted to bathrooms because of the “warm, moist environment” created by showers and plumbing. Even with regular cleaning, they can slip in through drains—especially the shower drain, which “stays damp and accessible.” This makes homeowners eager for a simple solution.

One surprisingly effective method uses a basic household item: a party balloon. Since cockroaches can squeeze through “small or irregular openings” in plumbing, the shower drain becomes a key entry point. The balloon trick focuses on reducing this opening without disrupting water flow.

To use it, the shower drain cover is removed and a balloon is prepared by “cutting off its ends” to make a flexible tube. This tube is stretched tightly around the drain cover. When the cover is placed back, it creates a snug barrier that cockroaches struggle to pass through. The method is simple but can greatly reduce the number of pests entering.

For stronger protection, the balloon technique should be combined with routine maintenance. Keeping the bathroom dry, cleaning drains, and minimizing moisture help eliminate the environment cockroaches prefer.

It’s also important to check for cracks, gaps, or openings around pipes. Sealing these prevents insects from entering through walls or floors. Together, these steps create a cleaner, more comfortable bathroom and help keep pests out.