Ammonia is a non bleaching, highly alkaline cleaner that will also remove red stains from carpet. Mix 1/4 cup of ammonia with amount 2 quarts of warm water and blot it on the stain alternating with a clean dry towel to absorb the stain.

Red wine stains tend to dissolve in the presence of vinegar. Mix together a solution of 1 US tbsp (15 mL) of dishwashing soap, 1 US tbsp (15 mL) of white vinegar, and 2 cups (470 mL) of warm water. Dip a cloth into the solution, then gently dab it onto the carpet, covering the whole stain.