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Old 04-09-2009, 02:06 AM
 
Location: Mountain Home, ID
1,955 posts, read 3,083,354 times
Reputation: 2414

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The water around here is really, really hard. Leaves spots on all my tupperware. Unfortunately, installing a water softener is out of the question, since I live in an apartment.

I use Jet Dry, and curiously enough, all the glassware comes out spotless, but all the plastics look like they came back from a polka dot party. It's gotten to the point where I've started washing and drying all my plastics by hand. Is there anything I can use in the dishwasher that will get rid of the spots?
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Old 04-09-2009, 02:46 PM
 
Location: Philaburbia
32,906 posts, read 61,328,113 times
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Pour plain white vinegar where you'd pour the Jet Dry. It will keep the glasses less spotty, but doubt it will do anything for the plastic. I still have to dry most plastic stuff by hand.

That's more a result of the physical properties of the plastic than it is the function of the dishwasher: Glass and ceramic stay hot from the rinse water longer, allowing the water to evaporate more quickly when the cycle is through. Plastic cools off more quickly, leaving the water on the surface longer.

Here's a fun link:

The mysterious workings of the common dishwasher - Naked Scientists Kitchen Science 2007
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Old 04-10-2009, 01:39 PM
 
Location: Mountain Home, ID
1,955 posts, read 3,083,354 times
Reputation: 2414
Thanks for the explanation. At least now i know why it happens. Looks like I'll need to just dry them by hand.
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Old 04-12-2009, 12:05 AM
 
48,509 posts, read 85,491,618 times
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Its called water spots just like allowing water to dry in a car wash. The harder the water the more likely the spots. Mine don't dry but we have soft water and they dry spotless in the sink basket .
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