Water heater dripping internally and eventually goes out
I purchased a water heater about 2 years ago from Lowe's. It's always been a little picky on what temperature it needs to be on to stay lit. Recently I noticed cold water (unexpectedly and not fun!) When I light the water heater (gas by the way) it stays lit and I can hear dripping internally and sizzling when it hits (not sure exactly where it's hitting.) Then makes a click as it shuts off. I noticed when I first went to light it, that there is a white ring around the bottom of the water heater like it had leaked and dried, but since I have been down there and watching (two days) there is no wetness on the outside or around the water heater. Please help.
-Chris