To stop a toilet from leaking at the base due to a failed wax ring, you must remove the toilet and replace the seal. Shut off the water supply valve, flush to empty the tank, disconnect the supply line, unbolt the floor nuts, and lift the toilet off the floor. Scrape away the old wax residue from both the floor flange and the bottom of the bowl, install a new wax ring (with or without a plastic horn), carefully lower the toilet straight down onto the new seal, and tighten the floor bolts evenly without cracking the porcelain. Callout type="warning" title="Hygiene Warning": Wear rubber gloves when handling sewage seals. Verification: Flush the toilet multiple times and check the base to ensure zero water leakage.
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