When we moved into our house several years ago we never had any dust problem. Now after several years we've notice we have a lot more dust than we use to have. Several people have told me that I need to get my ducts cleaned and this should fix this problem. The problem I have is I installed filters in all my outlet ducts (the inlet duct has Hi Efficiency filters) and these filters don't seem to catch a lot of dust. Does anyone else have this problem and if so what have you done to correct it?