I’ve had a MK4S for over a week now, and 100% of the prints I’ve tried to make on the textured sheets have partially or totally failed. PLA prints beautifully on the smooth sheet, but PLA, PETG and ABS, I think I could print on the surface of a 10 inch tank of oil with more success than the textured sheet. Plastic doesn’t stick to it. I’ve wiped it with isopopyl, I’ve washed it with dawn…it’s a bad print surface and I want my money back.
You mentioned using Dawn. Did you use the hottest water you can get from your tap, and maybe wash several times? I remember having lots of trouble with my textured sheet initially, but after a few good scrubs with really hot water and dawn, it finally started working just fine. Like there was some residue from manufacturing left on it that took some work to get off.
Per Prusa’s Knowledge Base I washed it with “warm water (not hot!) and a few drops of liquid dish soap (not hand soap).”
I’ll go get out my canning pot, boil up 5 gallons of water, and scrub it with a brillo pad and some brakleen. Can’t fuck it up any worse than Josef himself did.