So does lighter fluid or mineral spirits. Use them on shoes bought at Marshalls all the time--circular label with size on it.

Many, certainly not all, label glues get soft with heat. I use heat to remove labels from shipping cartons that I don't want soaked in my beloved WD-40. Some don't require much heat. Can you take the hair dryer to the label on the insole?

I have never had any spot left from lighter fluid....but I have had a sticky spot left from using heat.
Mostly I just leave the label on....it's a testimony to my frugality.....or wanton spending! LOL!
Linda C

Thanks everyone for all the good tips. we didn't have wd40 in the house so my husband suggested rubbing alcohol which got more of the stuff off (enough so I could wear one of the pairs...first dusted my feet with talc powder though, just in case :). I've been wearing the sandals all day. and yes, these sandals are from Marshall's (why do they put those big old orange size stickers on the insoles? sheesh...but they do have good deals!

Olive oil.

Vegetable oil, works every time. Just be patient and let it sit on for a few minutes.

WD 40 isn’t ok. I tried it and some letters got erased from my Kate Spade New York insole