My hot water leaked for several days from a small access hole (1 inch) for the wiring about 1/3 the way up the tank. The tank has no rsut on it and is opristine condition although it is 10 years old . State water heater , power vent. The water puddled on the floor and I vac'd it up several times and was planning on replacing it. Now it has not leaked at all for the past 3 days despite heavy usage of hot water . Why would it do this?