Quick answerBlot first. Then, for many water-safe carpets, use a very dilute solution of 1/4 teaspoon of liquid dishwashing detergent in 1 cup of lukewarm water. Apply a small amount to a white cloth, blot from the outside toward the center, rinse with clean water, and blot dry.
Before you mix anything
Check the carpet manufacturer’s care instructions and test any solution in an inconspicuous area. Specialty fibers, wool, natural-fiber rugs, stain treatments and delicate dyes may require different care.
The basic method
- Act quickly. Blot liquid with plain white paper towels or a clean white absorbent cloth.
- Do not scrub. Scrubbing can distort carpet fibers and spread the spill.
- Mix very lightly. The Carpet and Rug Institute recommends just 1/4 teaspoon of liquid dishwashing detergent per 1 cup of lukewarm water for its detergent solution.
- Apply to the cloth, not by flooding the carpet. Work gently from the outside edge of the spot toward the center.
- Blot and repeat. Continue while material is transferring to the cloth.
- Rinse. Use a small amount of clean lukewarm water and blot repeatedly to remove detergent residue.
- Dry thoroughly. Keep foot traffic off the area until dry.
More soap is not better. Leftover detergent residue can attract soil and make the cleaned spot look dirty again faster. The Carpet and Rug Institute specifically warns against stronger concentrations.
Why white cloths matter
Colored or printed towels can transfer dye or ink to damp carpet. White materials also make it easier to see whether the stain is transferring out of the fibers.
What not to use
- Laundry detergent, which may contain optical brighteners or other additives not intended for carpet
- Automatic dishwasher detergent, which may contain bleaching agents
- Hard scrubbing brushes
- Large amounts of water that can soak the backing
- Any cleaner that has not been tested on the carpet first
When to call a professional
Older stains, dye transfer, pet urine that has penetrated the backing, unknown chemicals, large spills and delicate fibers can require specialized extraction or treatment.
Source: This method follows Carpet and Rug Institute spot-cleaning guidance, including its detergent dilution, blotting and residue precautions. Carpet and Rug Institute cleaning guidance