Can I wet the soundboard cleaners to clean a very dirty board?
Not a good idea. They are basically meant to pick up dust only. The best way to clean a heavily stained board is to wet a cloth, such as a wash cloth, with some water and a little mild cleaner such as Murphy’s Oil Soap, wring out the excess, then use the soundboard cleaner to push the wash cloth. The soundboard cleaner lets you put good pressure on a wide area of the cloth and work it back and forth over stains.
