Logixx
I don't think it does 2 prewashes, but it does a purge after the prewash and fills with some water then drains before the main wash.....I was afraid of this too, remaining bleach killing the enzymes, but it's not.. It still works great. I think it's too small of an amount of bleach I'm using, add to the fact that it's diluted with the prewash and purge before the main wash, most of it's gone when the main wash starts. Like I said, the last time I ran a load, I added phosphate power in with the finish powerball main wash section, and at the end, the interior of the dishwasher looked spotless, I mean noting but shiny stainless. With just the powerball, you could see water spots on the stainless.