as title says, should i just use the blow dryer and knife trick ?

 

if its a vinyl sticker use either a blowdryer or a heatgun. heat up one of the corners then carefully peel it off trying to keep the sticker in one piece so you don't have to keep re doing it.

use a thin scraper

 

Those methods would probably work or as i do just scrape it off with a blade or hobby knife and then clean up left over residue with rubbing alcohol. Thats how ive always removed stickers from glass.

 

thanks for the help, i will take it off today

 

and I think I speak for everyone when I say "Thank you for taking it off!".

 

should come off the same as window tint:

step1. scrape it off using a razorblade, or peel off as much as possible with fingernail.
step2. get a green dish sponge like the kind mom uses to clean the dishes, get some nail polish remover, use the nail polish remover and sponge, first just dab the remover onto the glue residue, then take it off with the sponge by scrubbing it out.