Toilets can become wobbly over time. The water pipe and the floor can loosen and cause a toilet to wobble and rattle every time you sit down. A wobbly toilet can still function properly, but the rocking is a nuisance and can lead to or indicate the development of greater problems with the internal workings of the toilet. Wobbly toilets are typically caused by loose bolts or a wrongly set or damaged wax gasket ring. Take care of a wobbly toilet as soon as possible to ensure that further resulting problems such as leaking do not occur.
Remove the caps on the base of the toilet to reveal the bolts that secure the toilet to the floor. Check to see if the bolts are loose. If so, tighten them with a wrench. If the bolts are secure and the toilet still wobbles, the toilet will have to be removed for inspection and repair of the sealing ring.
Turn off the water line to the toilet. Hold the flusher down to drain the tank water. Sop up any last standing water at the bottom of the tank with old towels.
Unscrew and disconnect the toilet's water line tube using a wrench.
Remove the washers and nuts from the bolts at the base of the toilet with a wrench. Lift the toilet straight up and set it aside.
Use the edge of a putty knife to scrape and pull up the old wax gasket ring around the sewer pipe.
Remove the old bolts from the slots on the metal flange around the sewer pipe. Replace these flange bolts with clean, new bolts. Replacement flange kits are available it if the metal flange happens to be broken.
Insert a new wax gasket ring onto the flange.
Set the toilet back in place, and replace and tighten the nuts on the bolts at the base of the toilet.