I had a couple questions. I knew that this summer I would re-line my chimney with a liner. I had deposits that were horrible that were in the base of the chimney from the old woodfurnace that I couldn't get to. So I treated the chimney quite a few times in the spring and burned very hot fires to break down what was there. Everything is almost removed, but there still is a layer less than a 1/16th of an inch here and there of creosote. I have swept and swept and the first maybe 2 feet or so above the thimble still has a little. I plan on either using a thermix mix or straight vermiculite to insulate the liner. If the base of the chimney is sealed and the liner is packed in with vermiculite and the top of the chimney is sealed, if the liner comes in contact with anything thats left do I worry about it catching fire? I figure the insulation will help keep the heat away from the old clay liner and also stop any oxygen that can get to the fire. I'm OCD about the cleaning and I just can't get it all.