The device (1), made of paper tissue in the shape of the bottom of a flat toilet bowl, is inserted before the use of the toilet and flushed down together with the excrements. No traces are left in the bowl and in the pipe, no cleaning with a toilet brush is necessary. The paper is biodegradable and does not block the sewerage system. It comes either in rolls with a perforated part to tear off individual inserts or it is folded and can be taken from a box or a vending machine.
