We all know WD-40 works for making things move when they’re seized, but it also works better than anything for getting rid of all traces of adhesive left behind after peeling off stubborn stickers from things you buy.
It works on nearly all surfaces* – even coated paper! (just be sure not to leave it to soak into the paper.)
Instead of peeling slowly for ages with your fingernail or doing that peel-stick-peel-stick thing for half an hour, soak a paper towel in WD-40 and dab it on the offending sticker remains, wait a few minutes, then wipe off. (*if on coated paper, don’t let it soak, just gently rub it.) Clean the item afterwards to remove the oil left behind.
*it’s best to test a small area first if the object is painted or porous, and be careful with items meant to be food safe, because WD-40 is obviously not food safe.
This is something I wish more people knew, because soooo many manufacturers and retailers put stickers in the worst places and with near-permanent adhesive. I hope this helps you!
I would not recommend it though, especially on items made of plastic, finished wood, or rubber. Heat and a scraping tool are better, and barring that, a more mild or more polar solvent. WD-40 is not intended to be a solvent, and isn’t formulated for cleaning household items. It will damage or discolor a lot of materials, and it is really not worth it.