Those are a lot of fun to play with! Glad you got it working! Textured PEI sheets are great for PLA in general. Usually a good wipe with isopropyl alcohol before a print works to keep the adhesion strong. I find every once in a while actually washing and scrubbing it with dish soap and hot water is needed to refresh the PEI surface.
Wash your print surface with dish soap and water and dry with a paper towel or fresh towel. Avoid touching or contaminating the surface once clean and dry.
If that doesn’t work, get some magigoo