Most dont sanitize water heater?

You sanitize ANY water heater tank a few times a year by running the fresh tank bleach mixture thru it. The anode rod is NOT a smell stopper. What happens is, the water gets old if the heater has sat for awhile. Or you have marginal water like from a well. That is where you get the rotten egg smell. When you fire up the WH and it has bad water inside that heat makes the egg smell worse. One thing---This smells almost like boiled dry batteries and some mistake this both ways. Doug