Best thing to use to remove tape residue from vinyl window frames?

Try WD 40.

Sometimes I can get the glue residue from tape off with WD40, then wash with warm soapy water. Hope this helps

I frequently use spray cooking oil on tape residue and use one of those round plastic scrubbies to remove the goop. Buy it at the Dollar Tree cheap. It may take more than 1 application.

Goo gone has been wonderful to do this for me.

Thanks to everyone on the tape removal. I will try these suggestions. MJ

Put Goo Gone on the tape residue. Let is set for a while. Then use something plastic like a credit credit card to scrape it off. Wipe off the glue with more Goo Gone. Do not use any solvents on it. Can dissolve/melt the plastic.

This stuff is great Goo Gone https://www.walmart.com/ip/Goo-Gone-Remover-Spray-Gel-12-oz/13432555