Remove any cushions or pillows from the furniture. Vacuum any dirt, dust or pet hair from the pleather upholstery with a brush attachment or portable vacuum.
Fill a bucket with 1 gallon of warm water, and add 1 to 2 tbsp. of mild laundry detergent.
Dip a cloth into the bucket, and wring it out. Wipe over the pleather upholstery, including the cushions and sides of the furniture. Rinse the cloth in the bucket as often as necessary.
Empty the bucket and refill it with clean water. Dip a clean cloth into the bucket, and wring it out. Wipe the pleather upholstery with the wet cloth to remove any detergent residue.
Dry the pleather upholstery with a towel, pressing down firmly to absorb as much water as possible. Allow the upholstery to air-dry completely before replacing the cushions and pillows.