Ok so I moved into this house that had a roach infestation. I knew how to take care of the problem before hand by researching. So I used boric acid and got rid of the bugs, but what they left behind has been a nightmare! I had to use kilz underneath my counters, cabinets, anywhere the feces were. finally got the smell in my house gone. now autumn's here so i have to turn on my heat. I have found roach feces in my air ducts through heating up my home (and boy does it smell) and changing some of my vent covers. I can't afford someone to clean my ducts as its around $500 and I havent saved for it because I had no idea what I was getting myself in to with these stupid bugs. Can anyone please help me find a way to get rid of the smell and feces? I'll do anything as long as i dont have to hire someone yet.