Glass on Pioneer

I have two spots on the inside of the glass on my Pioneer that have bubbled and now there is a hole about the size of a dime.It is only through the inside portion of the glass. It looks like there are two pieces that form this glass. Jerry is this a concern and should I replace the glass before start-up.

I would think as long as it's not thru the glass, it should work.
Mine is all clouded up after one season, I tried keeping it clean, but no luck. It still discolored.

Wood009,
I wouldn't worry too much. When they crack then it's time to change. The glass is really not glass, it's ceramic, that's why its layered.
Jer
Always use your CO alarms.