Cockroaches can get into dishwashers through small gaps, drain pipes, and vents. They are attracted to the warm, moist environment and the food residue left on dishes. Since dishwashers provide water and shelter, they become an ideal hiding and breeding spot for roaches. One common entry point is the dishwasher’s drain. Cockroaches can travel through plumbing pipes and emerge inside ... ttps://safepestsol.com/how-do-cockroaches-get-in-the-dishwasher/