Ever since getting my Satin PEI sheet it never leaves my printer. Great adhesion for both PLA and PETG and prints release like magic when it cools off. But I started having corner warping on everything after 1,600+ hours of use. Drying filament, IPA cleaning, soap and water etc didn’t improve things at all.
Then I found a support article from Prusa suggesting to rubbing the plate with a dry sponge. A simple thing and it worked great. The Satin sheet is back to normal.👍🏼