Anyone who has ever had to remove carpet stains will appreciate this tip. If you have chocolate or coffee stains on carpet, dab with straight vinegar. That's all it takes. Blot until the stain is removed and blot again with a damp sponge or cloth to rinse. If the smell of vinegar isn't for you, try a mild else that dishwashing liquid for cleaning carpet stains. Pour some onto a clean cloth and blot until the stain is lifted.