First, I must mention that the sponge, I received does not coincide with the image that is displayed on this article. But I suppose because even that it is the same extinguishing principle, since the product description fits. The sponge does its job on average. Especially if the font shortly stands at the blackboard, he leaves marks. Even otherwise you can still detect a whiff of Scripture. It's quite a pressure necessary to remove that right. It works, but it could be better. Besides the fact that you can attach it to the table, I see no reason why one should so buy a sponge. A simple, dry Abwaschlappen will do the job better !!! (Apart from the fact that you can not attach this on the blackboard ...)
