We bought a house 2 years ago from people who have smoked in the house for 15 years. Before we moved in we painted kilz over everything and then painted at least 3 coats on all the walls. We also took out the carpet. Our house is now starting to smell just like when we first bought it again. It is a horrible cigarette smell and I am desperate for help on how to fix this problem for good. It seem to get worse since it started to get cooler and we are starting to use our heat.