Why does our livingroom & dining room smell like sweat?
We live in a 3 level duplex. We have a sweaty smell that comes and goes. We do not notice it in the basement(small basement w/furnice & water heater only). We also do not notice it upstairs(2 bedrooms & bathroom). We notice it inside near the front door & a little on the stairs leading to the top floor. The main floor we notice it in the livingroom and dining room most strong. Nothing in the kitchen or lalundry/half bath. It is not connected to weather, heating blowing. We have checked carpet, furniture, etc. Sometimes we won't notice it for months & then it will be back for months. This time it started, strange as it sounds, with a smell like pencil shaving (freshly sharpened pencil) & then became the sweat smell over a day or 2. Thanks for any help.