Wash the Roll-N-Lock® cover with soapy water (non-detergent). After rinsing it off with clean water and allowing it to thoroughly dry, make sure you apply the Raggtopp Protectant provided to the vinyl surface and track runners. 

Periodically check the housing and drain tubes for any debris, making sure to remove anything that could cause the drains to become blocked. Before removing the housing lid, make sure the cover is closed and latched to the tailgate lock-strip.

Periodically treat the track runners with a light application of the Raggtopp Protectant provided. NEVER use any type of grease, graphite, WD-40 or other petroleum derivative.