Hi chaps,
Does anyone clean skylights? I clean a building which has lots of windows on the roof. The problem is I can never get them totally clean. I use a wfp to clean them. Plus if you look at the picture at the black seal, it seems the rubber seal has cause a black runs. As you can see its an eye sore. Does anyone know how to get rid of the black runs. I thought it was hard water over time, but when I looked closley at them they seemed like rubber type runs! One picture is outside and the other is inside looking up. Cheers