How to remove Nair stain on tub? I was contained by a big rush to remove my leg...

I was contained by a big rush to remove my leg hair the other morning, and I left the blade-less cut-throat on the edge of the tub. There be still some Nair on it, so it left a brown stain on the fold of the tub. Any tips for removing it?
Thanks!
What do you use to purify mold rotten...
Answers:    Clorox or Tilex let it soak a bit afterwards scrub off near a sponge.
Red wine spilled on white velvet sofa and...