Having pretty much isolated where these disgusting June bugs were getting into the house (via the open mail box slot outside and then into the house because the cover of the inside slot is a grill with many holes in it), the final thing I had the worker do was get a flap for the outside so the slot wasn't open. That's now there and there is now no way for the dreaded June bugs to get in that way - in fact, when he was removing what was there he found a bunch of dead ones - so, hopeful that that solves that problem.