Goo-Gone or similar might work. I've used it on jars I want to save, to remove the gluey residue from the original labels. This is my go-to product when others are ineffective.

You can also try plain old vegetable oil.

I had no luck recently getting sticky label residue off a glass candle holder, and the goo gone and oil didn’t work. I ended up using alcohol, though it still took a lot of rubbing. I read that acetone nail polish remover works, but you’d want to use either of these with plenty of ventilation. Maybe try call a place that put sticky film on cars and vans and ask them if there is a way to get it off easily.

Goo Gone does not even work in comparison to the De-Solv-It. It is an amazing product. It even removes pine sap from hands in seconds with no harsh chemical issues.

Gasoline? Inside the house? Flammable fumes. Be very careful.

Warming it with a hairdryer can make it softer and easier to pull off.

I don't know about the gasoline idea... Though my Husband is a farmer so pretty much anything goes with him, too! Sometimes when finesse doesn't cut it I have to look at him and say "will you do the Farmer Thing on this?" That usually takes care of any problem I have!

Lighter fluid works great. Probably similar to the alcohol? Nice since it evaporates quickly after using it.

Removing sticky film left on windows is never an easy thing.. right? It can be sometimes very tricky to remove a window tinting but there is solution how to remove window tint. Use your hairdryer! It is very effective at removing old window tint from the house window.

If you are planning to install window tint again, I can recommend you a brand called Veilish. Recently I purchased and used it. It's very easy to install and remove by myself!