On my Original Prusa i3 MK2, the original PEI bed film lifted up with use of ABS and ABS juice. It then got sliced with a putty knife used to pry the parts off. A replacement film (only available from Prusa by begging Customer Service, cheap enough for the part but not so cheap with shipping, taxes and UPS fees) became a problem. A 2 day wait from Amazon produced a few Buildtak films. Removal ofby wattronix - Prusa i3 and variants