This week's tip is from Squeegee1 ~
Here's one for anyone who's had to deal with extremely difficult rear window tint removal - the ones that come off in 1000 tiny pieces.
Once you've sufficiently removed the tint from the rear window, eliminated the old glue and have scrubbed and prepped the window with your cleaning solution get out of the car and do a final lookover. Using either a dry-erase marker or scotch tape, place a mark underneath any remnants of tint that may have been left behind. Because you can't typically see the little pieces from the inside of the vehicle a marker placed on the outside will indicate where you need to spot clean with your soap spray and razor if necessary.
This will no doubt save your knees and back the hassle of getting in and out of the vehicle to re-check your efforts.