YIKES! NOT cleaning your
YIKES! NOT cleaning your glass before firing will come back to haunt you one of these days. Even your finger prints will be permanently imbedded if left on glass before firing…….of course, that can also make for an interesting piece of artwork, I suppose. Marker may or may not burn off. Dirt and grime may cause glass to crack or create devit.
I took classes from a " prominent teacher " who also gave incorrect information….lots of it actually. Forums such as these are an excellent source of information and have taught me MORE than the prominent teacher.
Cleaning glass is pretty simple to do and well worth the effort in the end. 
