For the second time this season my stove pipe temps have reached high temps. I am guessing 7-800 (High temp silicone burned up and turned to powder). The first time it happened I chalked it up to a dirty pipe touching off. But it just happened again with a fairly clean stove pipe. Air holes inside boiler are clear. Hex is a bit dirty but not so dirty as to cause this issue... Snow storm today but draft inducer is on same setting I always run it. Chimney is fairly clean, not plugged etc... Anyone else experience this issue?