Leave it to a 3 year old to destroy a concrete floor. Little Nellie Lou was spraying copious amounts of the sunscreen before interception and I cannot get the sticky out of the kitchen floor no matter what. Tried regular cleaner first then moved to Goo Gone, no es bueno. It would appear chemical reaction like acetone on lacquer.
I guess the 3 year old just made the decision on whether to keep or refloor the kitchen. ☹
No guarantees, but next try some stuff I find at Ace called Krud Kutter. I would have bet the Goo Gone would have done it. But this Krud Kutter stuff has easily pulled up long-time accumulated vaporized kitchen grease from vent hoods and such. Give it a whirl before you go to a really big expense. This stuff (as I recall) is not particularly toxic or odor oriented. So it's easy to use (spray bottle).
I have Krud Cutter. I've used it in the past on gutters and it made them shiny. Literally, it took off the paint right down to aluminum. I am convinced that this isn't a stain situation but that a chemical reaction has occurred and made the top sealer/stain sticky, like what happens to nitro with acetone, etc.
i'm trying some new stuff around the place called WET AND FORGET. my brother in law used it on his sidewalks and they look brand new. i'm going to try it on the deck. there's a version for bathrooms that's supposed to cut soap film... something like that may work for you? i don't know...
Play it with emotion and play it strong. Don't make a face and they won't know it's wrong!