We've been battling phorid flies in our house for quite some time. We had a good exterminator come out before it got cold out in the winter, and we thought we had it nailed. However, as soon as it started warming up, they reappeared. We are not positive of where they're coming from. The largest concentration of them have been in the kitchen and the upstairs bathroom. We were told it could be a plumbing problem or something else. But we don't have any plumbing back ups. This is what we've already done: -Put drain gel down the bathroom and kitchen drains for a few weeks. -Put tape over all bathroom drains and kitchen drain to see if they are coming up through the drains. We didn't see a single one. -Sealed off and taped kitchen window to see if they were coming through there, as we have mulch and soil outside under the window. Not a single one came through the windows from the outside. -Put tape over the air vents. We did have some flies stuck on the back side of the tape in the vent under the kitchen cabinet, and a couple on the back side of the tape on the living room floor vent. So, the little bit of evidence we have makes it seem like they are in the duct system. Would having the ducts cleaned get rid of them? Could it be something else we're not thinking of? We don't have a ton of extra money to have people come in and attempt to figure it out, but still have the infestation. Any experience or thoughts would be greatly appreciated! -

I have some mice living around/under my air conditioner and they have occasionally made it into the house. How do I go about making that area around the air conditioner inhospitable to them so they don't live there? I've been plugging up areas around the house with steel wool but am hesitant to use that around the air conditioner or any sprays around it. Thanks for any suggestions.