This simple balloon method works because it targets the roaches’ favorite route: the damp, dark plumbing lines running beneath your home. By cutting the ends off a standard balloon and wrapping the stretchy tube tightly around your shower drain cover, you create a flexible, narrowing seal. Water can still pass through, but the opening becomes much harder for insects to navigate, especially those trying to squeeze in from below.
On its own, the balloon barrier is clever; combined with smart habits, it becomes genuinely powerful. Drying surfaces after showers, wiping around the drain, and reducing lingering moisture make the area far less inviting to pests. Sealing tiny gaps around pipes, tiles, and walls closes off other hidden paths. Together, these low-cost steps form an invisible shield, helping keep your bathroom fresher, cleaner, and—most importantly—free from those shocking, unwelcome visitors.