I have never had to 'clean' any one of my personal machines....have had all types of water, and used detergents, bleach, and softner as required....
never had ay type of build up, or scum left behind, and I am not one to leave the drawer or doors open after a load.....
of course my machines get run almost daily, if not every other day, and 99% of the time its a Hot or Warm wash.....and can be a warm or cold rinse.....
I have gotten in many machines that look absolutely awful, and smell worse...and wonder how they got that way!....it will forever puzzle me.....