There is a simple method for cleaning your wall unit.
Mix together a mild liquid soap with water to a ratio of about one to ten, and then bottle this solution in a spray bottle. Then, spray this solution onto a clean cloth or towel and wipe the upholstery, frame, and all parts for general cleaning.
Never use abrasive cleaners or pads, because they will scratch the aluminum, upholstery, and wood and leave unseemly scratches on the surface.
For upholstery, make sure you don’t use too much solution when wiping. Because if the upholstery is saturated with excess water this can lead to cracks or tears in its surface.