I peel off using a razor blade and then spray window cleaner onto residual glue. Let soak and then simply scrape off using the razor blade. Easy.
Now, when you start talking about rear windows with demister wires, care needs to be taken to not cut the imprinted wires. Peel off tint and then use window cleaner same as before. However, after letting soak, use a soft toothbrush to rub off glue into loose residue and then remove with soft rag.
I have had good success and no damage using these methods.
BA'1.5' Pursuit 290
Lightning Strike / Reflective Orange Stripes
'General' Dog - AP's German Shepherd and Best Mate - 02Dec1998-15Dec2003.
'Pepper' Dog - General's and My Little German Shepherd Sweetie - 1996?-02Apr2006.
'Sako' Dog - My Beautiful and Pretty German Shepherd - 2001?-23Aug2006.