Questions about Reboon Tablet booncover M2

It is not an adhesive surface but a vacuum surface. The manufacturer states the following: If the vacuum surface of the boon should ever become dirty, you can clean the boon again under warm water, then air dry it and the boons will hold again like on the first day. Replacement or additional pads can be found here: https://www.digitec.ch/de/Search?q=reboon+vakuumpad

should be as an answer and not as a question