Abstract: A device is described for automatically lowering a toilet seat. The device includes a fluid chamber with a sidewall; a replaceable insert with an arcuate inner face and parallel seat-raised and seat-lowered edges against the sidewall. A vane with a seat-attached shaft, pivotal around a horizontal axis on the opposite side of the chamber, includes a shaft-attached paddle with a flexible distal end in brushing engagement with the insert. The distance between the insert wall and the horizontal axis decreases from the seat-raised edge to the seat-lowered edge increasing the resistance to pivoting of the vane, and thereby to lowering of the toilet seat as the seat descends. Different inserts can be used for different weight seats. The device can also include an adjustable seat stop to compensate for non-level toilets.