Before closing the Roldeck, first remove any leaves or dirt. This prevents the roller recess from also becoming contaminated. Clean the canopy of the Roldeck using a high-pressure hose and soft brush or sponge. Also clean the slats. We recommend cleaning the slats of the Roldeck at least twice a year with a high-pressure hose and a hard brush. Algae may develop both on the top and on the underside of the Roldeck. Lime scale could also develop on the top of the slats. In that case, first moisten the slats by spraying a descaler across the entire cover using a spray gun. Allow this to penetrate for 1 or 2 hours. You can then rinse the Roldeck off in rows from left to right. In this way, you wash off all the limescale from the grooves.