Hello. This is my first year of burning and I was outside moving snow today, looked up at my flue and noticed some brown gunk on the side of it. I attached some pics for you all to see. What is this? I stopped burning for now until I figure out what the problem is. Is it creosote? The main pipe in my living room sounds hollow when I tap it so I guess that means is empty? I have attacked pics of the stove in my living room. There is only about 6 feet of stove pipe coming out the roof
are a combo of melting snow on cap and wet wood. Try to split down some of what you have to smaller pieces and give more air by leaving the air control open a bit more and stacking loose. Any source of dry scrap like pallets or lumber scrap? That always helps marginal wood. Since you're not trying to burn overnight or while you're out of the house you can feed smaller splits to keep the fire going.![[Hearth.com] First year burner with question [Hearth.com] First year burner with question](https://www.hearth.com/talk/data/attachments/153/153913-fb435a1c57d8df782f193a61ae0716c7.jpg?hash=eX0R_72CHC)