DIY & Home Improvement

If tightening doesn't resolve the wobble and you notice a water leak or detect a smell you may have to take the caps and old bolts off. If on a long time, you may have to hack-saw them off. REALLY you should inspect what's going on. Turn off the water going to the tank, loosen those bolts holding it to the bowl and remove it. Then lift the bowl up and look. If you had a water leak and it's on a wooden floor you may have to do some major repair. If no damage, get a new flange, throw the old one away (I only worked with wax ones - there may be newer types out). Stuff a rag in the opening, by the way as you work on the whole thing - sewer smells you know.

I do not recommend half-ass repairs such as more chalk or wedges under the existing toilet. If the seal is broken due to the wobbling, you have the potential to have waste water escaping and going God knows where AND the situation will just get worse. Do it right.