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.
Mine works beautifully for petg but pla not so good. Trick is absolutely clean. Fingerprints are enough to ruin it. Keep using dish soap and be sure to rinse well with warm water. Forget about isopropyl! Use a fine dry microfibre cloth before printing. You can use a spray of 1L water mixed with a few drops of dish soap on the cloth but if the plate is already clean a dry cloth can be enough most of the time.
Finally make sure your first layer height is adjusted correctly. The plastic needs to he squished slightly more into the textured surface. If in doubt go closer until you are defiantly too close (like almost scraping) and then back up up again. Then you are sure.