We renovated a basement apartment on North Capitol that has had a terrible rat problem. We contracted American Pest, but they can't find the entry points, they just set traps, remove caught rats, and basically shrug when asked how to improve or solve the problem. Are there other companies/methods people have tried? It's not a food/cleanliness issue because they're staying in the ceilings and the walls. It's awful. The tenant is going nuts.
Hope my neighbors have good ideas!