Anybody got some ideas for this?

If the usual methods fall short, you can try several other common items:

Vinegar:
The acidity in white vinegar naturally breaks down adhesives. Soak a cloth in vinegar, place it on the residue, let it sit a few minutes, then wipe it away.

Baking Soda:
Make a paste with baking soda and a bit of water. Gently scrub the sticky area with this paste—it’s a mild abrasive that’s usually safe on glass.

Olive Oil:
Oil softens adhesive, making it easier to remove. Apply a small amount, wait a few minutes, then wipe clean. Follow with soap and water to remove any oily residue.

Commercial Products: Goo Gone and Similar Options