Sanitize ice maker and hot water heater - How to?

Most us sanitize our systems in the spring. The system starts out empty and all the water that gets pumped through the system has sufficient bleach to kill anything (that includes the hot water tank and ice maker) - I let it sit overnight and drain everything and add some hydrogen peroxide to help eliminate the residual chlorine smell. I don't think you have to do anything special to address hot water tank or ice maker so long as you start off with a winterized rig b4 you sanitize.