I read recently about an absurd machine which recycles office paper into toilet rolls; very inefficiently.
Today’s invention is an improvement on that slightly crazy theme. A4 sheets are taken into the washroom by an individual and are there shredded very finely; with strips << 1 mm wide, forming a suitably soft, and flushable, matted fuzz.
The shredding is achieved by placing one’s sheets in a hopper on the back face of the door and levering it into the closed position. Only a few sheets would be needed each time to create a usable volume of mat (which will be highly unlikely ever to be pieced together again).