The Pane

To clean the outer pane turn the sash to a 180 degrees angle
So both your hands are free to clean, slide the barrel bolt into the bushing at the bottom of the frame
Clean the pane with a cloth, a nonabrasive sponge or a non-metal window squeegee
Non-abrasive household cleaners can be used when cleaning the pane of your Velux Roof Window, but ideally you should use clean soft water
Always apply water before attempting to clean any dirt off the plane

Clean the Air Filter

Rotate and secure the window in cleaning position, and remove the air filter

Ordinary household cleaners are sufficient when cleaning your filter

Clean the Flashing

To allow rain water to flow freely, at least once a year you should pay attention to removing both leaves and other debris from the flashing around your window