Step 2 · Clean and Inspect Old Flange
With the toilet removed, you will see the old wax ring on the flange. Wearing disposable gloves, use a putty knife to scrape all of the old wax off the flange and the bottom of the toilet's outlet horn. Dispose of the old wax and closet bolts in a trash bag. Thoroughly clean the flange and the surrounding floor area with rags and a household cleaner. Once clean, carefully inspect the flange for cracks or breaks, confirming that the damage is limited to the ring and that a repair ring is the appropriate fix. Stuff a large rag into the drain opening to block sewer gases.