So after the fresh snow last week I found ash and soot in a 4' spot under the vent. It wasn't covered but a lot of it. The only thing I have done out of the ordinary was crank it up on 5 for a few hours to bring up the house temp after I was away for a few days. Normaly it's on 3 all the time. Anyone else have this? Maybe I just never saw it before (note it was two days before weekly cleaning)