We just left an apartment building with a long term chronic problem. They would come by frequently to place gel and diatomaceous earth and it seemed to do nothing. Out of desperation, I tried something I read online: a few small plates of peanut butter in high “sighting” areas. Before putting it out, I’d dust the plates and peanut butter with boric acid. It seemed almost completely get rid of them. I tried stopping it a few times and they came back in a week or two. Same if I left the same peanut butter out. But if I put out new peanut butter every 7-10 days with new poison on top all was good.
The plural of anecdote isn’t data but it may be worth a shot if you’re battling something similar.
