When this happens water will start to leak out and bad odors will as well. If not fixed right away, this could also destroy your floor and cause you to have to repair or replace the floor.You then lift the toilet off the floor and lay it on its side so that you can scrape off the old wax ring. Any wax residue that is left on the floor should also be scraped up. You may now press the new wax ring onto the toilet and re-set the toilet back onto the toilet flange. To avoid this, make sure your toilets screws are always tight and repair any leaks right away. A new wax ring should also be installed any time the toilet is removed such as if you happen to be replacing an old toilet with a newer model that you liked such as a more modern KOHLER brand. Replacing your toilets wax ring is pretty simple to do and can pretty much be done in less than an hour by the average person.If the toilet is not screwed securely to the floor, it will "rock" when a person sits on it which in turn will wear out the wax seal. The first thing you need to do is to turn off the water to the toilet by turning off the water supply line behind the toilet. Next you need to empty the toilets bowl and its tank of water. Then you will need to disconnect the supply line from your toilet. Next you need to unscrew the anchor nuts that are attached to the hold down bolts.