Which factor contributes to the risk of cockroach infestation?

Repairing holes in walls and fixtures is essential in minimizing the risk of cockroach infestation because these gaps serve as entry points for unwanted pests. Cockroaches are adept at finding small openings, and even a tiny crack can be sufficient for them to gain access to a home. By sealing these vulnerabilities, homeowners can significantly reduce the likelihood of cockroaches entering and establishing a presence indoors.

In contrast, using synthetic materials in the home does not directly relate to the attractiveness or accessibility for cockroaches, as these pests are more concerned with food, water, and shelter than the materials of the home. Keeping the home extremely cold can deter some pests, but cockroaches are generally resilient and can survive in a range of temperatures. Leaving windows open for ventilation may inadvertently create more access for pests, as it can allow cockroaches to enter from outside, making it counterproductive for preventing infestations.