I am not new to smoking a pipe. But recently I seem to be having an issue with an uneven burn of my tobacco. It want to burn down one area, similar to a "run" on a cigar. I think it does have to do with how I am packing my bowl but I have not changed the way I pack the my pipe, at least I don't think I have. I have not changed tobaccos, and I light it the same as before. This is not particular to just one pipe.