Sonny, all tolled, it took less than an hour to change the glass. Nearest delaer don.t install, only sells. So I am pretty sure he would be useless. Besides, I love learning to do this stuff at least once. Now if in a pinch I know what to do.
Struggle, I honesty used a rag I had forgot had furnace cement on it. It will clean up somewhat, but what you see is where minute ash & debri has settled back into the very fine scratches.
I was tempted to see if I could buff them out with a buffer. But it is really ceramic after all. I have a back up now.