I have an upgraded Whirlpool (3 years old) and a whole-house water filtration system. I use Finish tablets or Cascade tablets and the dishes are glean, glassware shines, etc. That said, even on the heat drying cycle, there is still a bit of water in the interior of the machine. I had called Whirlpool about this, and was told that because everything is now HE, the drying time ends when the dishes are dry, and remaining drops in the interior will not evaporate further. Who knows, but I find a big difference with treated water.
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