Had to laugh at your post! I make bread & butter pickles because my husband likes them...use lots of turmeric. Anyway, I once spilled some on the counter and tried numerous kitchen cleaners, soft scrub, etc.
I eventually grabbed the straight-on, full-strength Windex. I sprayed it on there, and decided to let it sit for a little bit (probably not the best idea, but I was annoyed and always enjoyed chemistry lab...nearly blew it up once in college, but that's another story). At first, nothing happened. BUT, after about 30 seconds, a major chemical reaction of some sort occurred...bubbling, hissing, the whole works.
Waited for it to stop, wiped up the mess, and voila: no stain, and no hole in the counter!
Of course, this is a laminate counter top...goodness only knows what would happen with other surfaces...but it's worked every time I've tried it since.
Interesting! I have Formica counters, so I’ll have to try soaking stains in Windex.
We made phosgene in my high school chem class ... the teacher was a WW1 vet, ancient and quite drifty ...