One part Dawn dishwashing liquid mixed with two parts HYDROGEN PEROXIDE. Add baking soda for scrubbing help. Use laundry brush to work into the stain. Supposed to actually take yellow armpit stains out of white shirts!
10 Graphs That Will Make you Pro at Cleaning Anything
Woolite Foam Carpet Cleaner - Sprays out in foam stream so you can spray right on grout line. Let set several minutes, brush, wipe away. Easiest way ever to clean gross grout! I love Woolite carpet cleaner anyway.
Style Secret: The Only Spot Remover You'll Ever Need
Spot remover Mix one part Dawn dishwashing liquid (the plain old blue kind, in the big bottle that usually sits on your sink), with two parts hydrogen peroxide (available at any drug store), pour it directly on the stain, and watch it disappear like MAGIC
Granite Countertop Cleaner - Fill a spray bottle about full with rubbing alcohol, add a drop of Dawn dishwashing soap, a few drops of scented oil (optional), fill the rest of the way with water, shake together.