Water heater is leaking and you can't find the source
A water heater that leaks slowly is usually leaking from a fitting or a valve, and those are repairs. Dry the whole unit, then check three places: the connectors on top, the T&P discharge pipe on the side, and the drain valve at the bottom front. If every fitting stays dry and water keeps appearing under the tank, the tank has rusted through and the heater gets replaced. A leaking tank is never repaired, at any age.
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