Urine Stained Grout?
Home depot makes a grout cleaner in a large orange bottle, its amazing. Spray on, wait 2 minutes and wipe clean. Its also excellent at cleaning tiles with texture or divets. After cleaning though, you would want to seal the grout, with a grout sealant to prevent...
Painting Discolored Grout?
They make grout cleaners. You can pick them up at your local DIY store. Kelvin is right in that you should avoid the acids. There is a brand made in an orange bottle, and it works excellent, spray on, wait 2 minutes, srub off. After that dries you should then...
