We got the exterminator coming out next week to treat for the carpenter ants that have infested the area between the upstairs floor and downstairs ceiling. Good thing we caught it when we did or the bathtub might have ended up in the kitchen. The thing is, we treated for carpenter ants 4 years ago and now they're back again! I understand they're difficult to eradicate, but I have the distinct impression that when we treated initially a bunch of ants croaked and then they proceeded to invade the neighbors house instead. I know this because I've seen an exterminator out at three of the four neighbors houses during the ensuing years! So I feel like we're playing 'pest ping pong'
I don't know, maybe I'm being too cynical. How about you - have you ever hired a pest control service and got your problem cleared up without any recurrence?