Bike Wash: Spray onto surface to be cleaned and allow to penetrate. Brush with soft brush and rinse with water. In case of excessive buildup, leave for a few minutes before rinsing. Degreaser: For cleaning gunked–up chain (from previous oil, other dry lubes or new chain grease), spray onto chain undiluted while turning cranks backwards. Use firm brush to agitate and accelerate Bio-Bike’s dissolving action. Rinse with water after a few minutes.