Hair drier, warm the tint so the glue heats up and peel off...
Auto smart tardis afterwards to remove the left over glue residue.
Then clean the window.
Peel off film
Clean glass with pure acetone & wire wool (this removes the sticky residue)
Clean again with tardis & wire wool
Polish glass with windolene
Takes approx 20-25 mins per window.
Easy peasy.
Isn't the tint meant to be on the outside of the glass?