Removing print/skirt from BuildTak PEI Sheet

[AD5CDA 3]

I am having a heck of a time removing prints, and even worse, the skirt from my BuildTak PEI sheet.  I am mostly using ABS, I was initially using Magigoo but after my struggles tried without it, and adhesion definitely wasn't an issue as I still can't get the print/skirt off the build plate!  I end up using the print removal spatula which does okay for the print, just leaves a little ghosting, but doesn't really do the trick for the skirt.  It's on the bed so good I have ended up scratching the sheet.  After the top layer of the skirt gets off with the spatula I have been rubbing the PEI sheet with acetone on a cloth.  There has to be a better way.  Any thoughts would be much appreciated.  Thanks!

[AD5CDA 3]

@gr5 You seem to be quite the expert, any thoughts on this?  Thanks in advance!