A really long time ago we had some friends that would bring their kids over with red koolaid. Even though I insisted she not do that.
Peroxide & dawn dish soap.
(2 parts peroxide. 1 part dish soap)
And we didn’t use a white towel.
We used green.
It still worked.
The spot in the after picture is still damp.
Maybe I’ll remember to eventually take a dried picture.
Kidding. His knuckles say “American” in case you were wondering.
He was super curious about what we were doing.