Yes unfortunately the heat of the coal fire cooks the nozzles. I also wanted to try a piece of KAO wool to insulate the nozzle but never got around to it. It is worth a try or keep a replacement nozzle handy. Pain in the butt, but you know you will get a good flame if you change it.
daluds wrote:I need to switch to oil when I travel, but am finding the nozzle keeps getting clogged with baked on oil. Is there a recommend way to prevent this from happening? I have been using the 1.50 80A nozzles, and running on oil once a month to keep it going. Should I put some kaolwool inside between the nozzle and door to reduce the heat from the burning coal? I find once I put in a new nozzle it runs fine. I could take out the nozzle everytime I run coal, but this is a pain. I planning on trying a 1.25 70A nozzle soon.