Unscrew the cap to open the refill canister. Insert the refill canister into the bottom of the brush. Twist the canister into the bottom of the brush until secure. Remove the cap from the top of the brush. Turn the base of the brush to the unlocked position, it will click. Shake the brush upside down to release product. Apply generously to body, face and scalp for sun protection. To wash, turn the base of the brush to the unlocked position and remove the magnetic brush head. Cleanse the brush with a mild cleanser. Lay sideways to dry.