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What's causing this?

We have a Kenwood quiet guard 4 dishwasher and everytime we run it there is a chalky residue all over our dishes and utensils.
Todd Klosterman, September 2010
try some salt and wash it empty

colcox, September 2010
Wikipedia has a good article on Dishwashers.

Salt, Rinse Aid & Detergent all play their part in efficient washing.

The detergent and the heat sometimes cause cloudy hazing on glassware - permanent & impossible to remove.

Debris stuck to the dishes is just broken down food particles (sometimes small pieces of lime-scale too) baked on during the drying process because of lack of rinse aid.

Peccavi, September 2010
link Click here to see other fixes for Kenwood quiet guard 4.