We bought a new Hot water heater 2 weeks ago. Every time someone takes a shower, Water, Inside the tank splashes onto the burner. (Gas Heater). You can see the flames turn from blue to bright orange and yellow. What was once a drip, now sounds like constant splashing. We called the distributor who had never heard of that, but was sure it wasn't covered under the warranty. He said, Maybe it was condensation. That just doesn't sound right. It's not tiny little drips. But, it does stop after about 15-20 minutes and only drips after showers. Has anyone heard of this before? Is it something we should be concerned about?