About 2 1/2 years ago we had an infestation of what I was told (by an exterminator) were fungus gnats/flies. We had a leaky pipe in the ceiling of our basement (partially finished basement). Pipe was replaced and bugs were treated but the problem never really went away. Multiple exterminators have been to my house over the past 2 years. I open the basement wall (it was drywall/plaster over brick) and found lots of bugs. This wall was below the original leaky pipe. They were treated with multiple applications and the problem seemed to go away (from December to March they largely disappear). Early this year we had a sewer back up and we discovered the the pipe that comes from our upstairs kitchen sink had a broken in the floor of the basement. this likely had occurred years ago when a french drain was installed. The pipe was dug up (lots of dirt was removed and the ground was treated. Bugs have largely been gone but have suddenly returned over the past 3 weeks. We are also getting them on the other side of our basement as well (unfinished side f the basement). Our basement is not very damp and we run a dehumidifier daily. My theory is that our french drain is the source of the problem (since we have the bugs on both sides of the basement and the french drain is internal and goes around the entire basement. The weird thing is that we really don't see any bugs from December - March/April - this year very few until late June. Are these bugs getting in from outside? should I try to have my french drain flushed? I really would appreciate some guidance. Also - I live in Pittsburgh, PA.

I been having an ant problem for many years and it seems to be getting worse every year and I'm not able to get a complete kill. My wife and I own a condo and the complex is built "stair stepping" up a hillside on the coast od southern California. The way It's built, the crawlspace under our unit only gives me access to the rear 20 foot or so of the condo. The rest of the unit is over the living space of the condo below us. But the part I can access is below the problem area and contains most of the plumbing and piping of our house. The problem I have is ants coming out between the baseboard and tile floor of the toilet closet for the master bathroom. Before when we had ants in other parts of the house I would use Advion gel in baitstations and if the ants did reappear it seems like after baiting them twice they would be gone for the rest of the year. (I only see ants here spring through fall). I go under house and I don't see any ants or signs of ants coming down from the problem bathroom. Since the units are built on a cement foundation and crawlspace the hilside is about a 45 degree slope, I'm about 8 foot below the bathroom floor so I can't get a very good look. But as long as I'm down there I spray everything anyway. Over the years I have used Lambistar Ultracap, Onslaught, and yesterday Taurus SC. Everything under the house is unusually clean It's 27 years old but has very little dust and I see absolutely no signs of water or food, nothing leaking or no signs of anything leaking over the years. I see no spiderwebs or any pests or bugs. The ants are either living in the walls or coming from the unit next to me or above me, Being near the center of my unit it's at least 40-50 feet to the nearest dirt or vegetation and I have no idea where they are actually coming from. I have used Advion, Optiguard, and Terro over the years and they work in that order best to worst. The ants almost never eat protein based bait, I have tried several of those to no effect. Now it has gotten so bad that I put out 3 baitstations, have extreamly active feeding on them a few days but then the ants only disappear for a week to ten days at the most and the cycle starts again. I have been extremely reluctant to use any type of insecticide in my house and the baits used to work fine in the past. I have also not fixed the crack where they come out of because I figure they will just find another place to come out and the bathroom is next to our bedroom and if they found there way to my wife or our bed there would be a serious marital problem. Drastic times lead to drastic measures. I looking for advice on what would be the best and longest lasting total annihilation of these ants. It's just me and my wife, no kids or pets and it's just a toilet closet far away from the kitchen or pantry. Is there a better bait? Should I use Taurus even though it's not really approved indoors? If I make holes in the wall between every stud is there a dust or spray that will give me long lasting results so I don't have to knock holes in my walls every year? I also have access to professional grade products and a pest control company if needed. Sorry for the very long post. I appreciate any help and suggestions you can give me.and I'm sorry I don't know what kind of ants they are. Dave