My Black Knight back glass has sum sort of mold spots over most of the glass.
This has gotten worse over the last couple of years to the point you can see it through the BG when its lite.
Try to keep the game ventilated and switch it on for a while to try and disburse moisture.
I would like to get a replacement BG but new is expensive and finding a good replacement used is like trying to find a needle in a haystack
Is there any way of cleaning it without harming the screen print ?
This back glass has sum scratches and lifting in the blue, and cracks in the yellow.
If anyone has a better Black Knight Back glass for sale I would be interested.
Attached sum picks.
Pinpal........