Quoted from ralphcousman:If you have “wet spots “ you did not prep correctly.
You dont wax the protectors. This may add to the cloudiness, they need to be polished. Traditional waxes that fog and leave white residue is a no no.
The "wet spots" are not actually wet. They are just an optical phenomenon called "Newton Rings" that can happen occasionally where the PET-G contacts the clear coat. All the prep in the world is not going to get rid of this. It just looks wet, but there is zero moisture in the area. It also can occur occasionally where a translite touches the glass in front of it.
I have a couple of Newton Rings under my factory installed WOZ playfield protectors and they are still there 4 years later. I have had the protectors off, cleaned, and put back on. Always in those same spots. I have seen it on other machines as well, and then I have used a protector on machines without having any spots. I had a couple of the spots on my factory Scared Stiff translite also.