Scrape off the old wax ring from the flange, toilet base, and floor using a putty knife. Inspect the flange for cracks, rust, ...

If the toilet is wobbly, the floor flange is probably broken and needs to be replaced, which requires removing the toilet. Anytime someone pulls (removes) a toilet from the flange or is replacing ...

Perhaps the installer used a ring that wasn't thick enough, or perhaps the flange is high enough to lift the toilet off the ...