My laser window (the one with the silver casing on the side of the carriage) developed a crack, so I ordered a new one.
The replacement arrived, but it has a smudge on the inside, the part that faces away from the bed. The Glowforge instructions say to wipe the front of the lens to clean, but they don’t say if the inside or back can be cleaned. I don’t want to ruin any sort of coating it might have so I wondered if I could clean it.
I emailed glowforge to ask, and their response was that they didn’t know and I should ask here. So that is what I’m doing.