Apply ammonia solution, rinse and blot as instructed in Step 1. Do not dry with paper towels. Proceed to Step 3 to neutralize the ammonia. For Coffee and Tea Mix equal parts of white vinegar and water in spray bottle. Apply vinegar solution, rinse and blot.
Some spills contain chemicals that discolor or even damage carpet fibers or dye.
If you have doubts about what caused the spot or how to remove it, contact a professional carpet cleaner.