Toilet seat bumpers are the feet secured to the bottom of a toilet seat that keep it from moving when you sit on it. A moving toilet seat is uncomfortable when you're using the toilet, because you're always trying not to fall off, and it's destructive to the toilet seat screws, as you'll often find that the screws loosen as the seat moves. Toilet seat bumpers are easy to install and they'll prevent you from falling and having to replace the whole seat.
Clean the toilet thoroughly with household cleaning supplies before installing the bumpers.
Lift the toilet seat up so that it rests against the front of the water tank.
Uninstall any present bumpers. To do this, extract any screws on the bumpers with a Philips screwdriver and pull the bumpers off the toilet seat.
Some bumpers snap into place without screws holding them. If this is the case, detach the bumpers by pulling or prying them loose.
For snap-in bumpers, align the small knobs on the bumpers with the corresponding holes on the underside of the seat. Snap the bumpers into place.
For bumpers using a screw, mark the toilet seat in the places where the bumpers will be installed. Remove the screw if it is in the bumper. Start a screw into the seat and remove it; the hole it leaves can be your mark.
Place the screw hole on the bumper over the mark and insert the screw through the bumper and into the toilet seat. Insert the screw completely so that the bumper can't move.
Repeat this for the bumper on the opposite side of the toilet seat.
Put the seat down on the toilet and sit on it to make sure the seat doesn't move. If it does, tighten the bumper little by little until the seat remains still.