Fill
a spray bottle with one part white vinegar and seven parts water.
Fill a second spray bottle with one part non sudsy ammonia and seven parts
water. Saturate the stain with the vinegar solution. Let it
soak for a few minutes. Blot thoroughly with a clean cloth.
Repeat the process with the ammonia solution and let it soak for a few
minutes. Blot with a clean cloth. Repeat the process until the
stain is gone.