Got a house to clean tomorrow that has painted wooden frames and sills. The customer has just texted asking if I can remove the stains on the edge of the sills. You may have noticed this kind of staining before.....vertical lines caused (I think) by rainwater running off the sills. It can normally be partially removed with a wet micro fibre and a bit of elbow grease. However, this customer is particularly fussy so I wondered if anyone had a quick effective method of removing this type of staining. I might be wrong, but didnt someone on here say that magic sponges shouldnt be used on wooden frames and sills?.