hello. i suspect we have a dead mouse in our duct work. i recently put posion around the basement because we were starting to have a mouse problem. i was also seeing droppings around a few of the vents on the 1st floor. there is one vent that smells bad when you walk by it, and absolutly aweful when the heat comes on.

our system does not have a main trunp line... each dust comes right from the furnace.

how can we get rid of the smell?