Least risky way of removing dealer stickers

[GrizzlyBear]

OK, may be a basic question, but here we go:

The supplying dealer has added a few stickers advertising their business to the rear screen, I want to remove them as they have become crinkly and look horrid, sadly they have placed them over the heater rear window element which I obviously don't want to damage.

So any tips on removal that won't damage the heated screen element?

[Simon_GH]

The usual advice is to heat them with a hairdryer and don’t scrape on the window heating elements. Remove sticky residue with a solvent. They shouldn’t cause any trouble.

[the-norseman]

What type of sticker are they?