Common misconceptions about cockroach control include the belief that over-the-counter sprays alone can fully eradicate an infestation. While sprays can help, they are often not sufficient for complete control and may only kill visible roaches without addressing hidden populations. Another misconception is that cockroaches can be eliminated by simply keeping a clean house; while cleanliness is crucial, effective control often requires a combination of treatments and professional intervention to address all stages of the infestation.