They are charging Rs 350 to remove the tint from the glasses and its day light robbery. I suppose you cannot blame someone to be opportunistic and this is the week for some of them to make a killing.
Anyways, I decided I will not pay so much and do it myself. Spent 45 minutes and have managed to remove it cleanly without scratches or residual glue.
I have a cheap hand held steamer and use it when I have a cold etc. Its easily available in medical stores in Bangalore for Rs 100 or so. I steamed the film from the inside for 5 minutes, wiped the film with a cloth and then pulled the film off quite easily. I had the film on all 4 windows and the back so took me about 45 minutes.
There was minimal glue left on the glass because of the steamer. So I went to hardware store and bought half a liter of paint thinner for under 15 bucks, socked a piece of cloth and gently removed any remaining glue.