A new clean razor blade will take off the sticky parts no problem. Just go slow and try not to scratch the glass or trim. If it's really hard a little goo-gone on the sticky part only will loosen it up. Or heat.
I still got that driver side window sticker that warns you about hazardous materials stuck on. Just too lazy, I've been telling myself many times I need to take off that ugly sticker.
Mine are multiplying. Had my remote start installed the other day; noticed a new sticker on the window this morning. That makes three on each front window.
