Wikipedia article says this...
Some newer dishwashers allow the use of "all in one" tablets (which include an amount of salt along with detergent and a rinse agent) instead of using separate salt and rinse aid, but dishwasher salt must still be added to the salt compartment in very hard water areas.
However, best results are achieved by using separate salt, rinse aid and detergent rather than using the combined "all in one" detergents with these included.
Incorrect use of "all in one" tablets/detergents may not be covered under the dishwasher's warranty; it is advisable to check the instruction book when using these types of tablets/detergents.
Peccavi
March 2010
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