replying to pfb123, Joann Myers wrote:
I take medication that causes my urine to turn bright yellow and stained my
toilet seat bad. Tried bleach, vinegar, scrubbing pad, scrubbing powder.
Nothing worked. Found a product Krud Kutter Concentrated Cleaner Degreaser
Stain Remover. White spray bottle with red label. Cost about $12.00. Buy at any
hardware store. Hopes this help and didn't damage seat and turned it white
again. Bio degradable and non toxic.