The BIRKENSTOCK® Footbed & Shoe Cleaner helps remove everyday dirt and stains from all materials. To apply: Shake well before use. Prepare a container with lukewarm water. Spray the Cleaner two or three times directly on the damp sponge. Rub in with your hands to form foam and apply to the upper or insole of the shoe. Leave to soak for a short time and then remove the foam with water. Do not hold the shoe under running water; carefully remove any residual foam with the clean sponge. For stubborn stains, soak longer and repeat the process until shoe is clean.