Fill a spray bottle with 3 parts water and 1 part lemon juice. Shake the bottle well to mix the liquids.
Lay your Lululemon yoga mat flat on the floor on top of clean towels. Spray the entire surface of the mat with the lemon-water mixture.
Rub the surface of the mat with a clean, damp towel. Make sure all of the soiled areas are scrubbed with the towel.
Wipe the surface with a clean, dry towel. Flip the mat over and repeat the cleaning process on the second side. Cleaning both the top and bottom layer of the mat ensures that it will stay clean when the two sides touch, such as while it is rolled up.
Hang the mat over a clothesline or shower door to dry. Allow the mat to fully dry before using.