If it's smooth glass I would use a scraper to cut it off the glass and remove and last bits of residue with a wipe (alcohol or wonder wipes). The scrapers of this style are my preference :-
As others have said, you need to be careful and cut between paint and tape to retain the edge of the paint. If it's exterior and properly taped it should have a 1 - 2mm gap between the woodwork and tape which is painted as this helps the paint to protect the woodwork.
I don't carry or use a hairdrier in my tools so I can't say if that works better.
If it's smooth glass I would use a scraper to cut it off the glass and remove and last bits of residue with a wipe (alcohol or wonder wipes). The scrapers of this style are my preference :-
https://www.toolstation.com/stanley-window-scraper/p70065?store=LA&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&mkwid=_dc&pcrid=558571386879&pkw=&pmt=&gclid=Cj0KCQiAhf2MBhDNARIsAKXU5GSh0Qwgo6KZl6NIYlZOZm9sPBaSOufuZg7kchkbCVQEHq786UEZSiYaAkLEEALw_wcB&gclsrc=aw.ds
As others have said, you need to be careful and cut between paint and tape to retain the edge of the paint. If it's exterior and properly taped it should have a 1 - 2mm gap between the woodwork and tape which is painted as this helps the paint to protect the woodwork.
I don't carry or use a hairdrier in my tools so I can't say if that works better.