I follow the same routine as Dave and never have had a problem. Just make sure once you the sanitizing solution in the fresh water tank, run all of the taps, hot and cold, until you smell bleach. Don't forget the outside shower. After all of the taps have been run, let it sit for 4 hours before you drain and flush out the solution. If you can still smell bleach after 2 flushes, try adding a little baking soda to the flush.
Good luck and welcome to the wonderful world of rving.
Fred
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