It's no surprise the kitchen tops the list. Food, water, and warmth all live here, which makes it the single most attractive room in the house for cockroaches, ants, and the occasional mouse looking for an easy meal.
Start with the basics: seal food in airtight containers rather than leaving packets folded shut, wipe down benches after cooking, and check under the sink for any dripping pipes that might be creating a hidden water source. Gaps around the stove, behind the fridge, and inside cupboard hinges are common entry points worth checking regularly, since these spots rarely get disturbed during a normal clean.