Some people have reported a scratched, fogged playfield protector despite extraneous efforts at cleaning, but using a microfiber cloth. I have the German brand on mine with the instructions specifically urging to avoid microfiber cloths in cleaning because it will ultimately expedite dulling the protector. Not sure if this is the case with yours or some others whose pps have dulled. I am getting a few “wet” spots, but I’m really happy overall with it on my ToM.