How do you clean secondary windows?
To clean your secondary glazing all you need is warm soapy water and a cloth to wipe the frame and glass. To clean the inside of side-hinged secondary windows, open them fully and clean them as you would the outside. If your windows open on a horizontal slider, then follow the instructions to take them out of the sliders and clean the panels individually. Secondary windows on vertical sliders can be tilted open to allow for easy cleaning.