Happy New Year everyone. My squirrel has been in situ for about three years, no problems. Over the last day or so I have noticed a bit of smoke in the boat and was leaving it till this weekend, in the light, to investigate. There is some gungey, treacley stuff on the pipe coming through the roof and I believe it is this melting and smoking. I have scraped off as much as I can and will let the stove out by tomorrow morning and get it all off and seal it. What I don't know is what to use for the best, what this treacle stuff is, why it has started doing it now. I have lost my coolie hat in some trees recently ish and have foiund a bit of water round my stove when it has lashed rain. Sorry if this is a bit disjointed. Thanks to anyone who may reply with help. I rarely use anything but coal in the stove and start it with kindling and firelighters.