Tip & How-To about Dishwashers

Hard water Calcium white powder build up in dishwasher

Calcium and magnesium is present in a great number of homes today regardless of hardness or softness of the water. Water containing dissolved carbonates of calcium and magnesium can lower the effectiveness of the detergents you use and leave deposits on the dishware and tub of the dishwasher. When these deposits dry they become what some call lime scale.

To remove these deposits there are a number of cleaners on the market today. I will list them in the order of my preference. You can find them near the dishwasher detergents. If you use them read the instructions on the label, but basically you can run a cycle with no dishes and the cleaner. Some of the cleaners like Lemi-Shine can be used with a full load of dishware after you clean the tub. This helps keep the tub clean and deposits off the dishes. If you want a home remedy that seems to work pretty good, put a cereal size bowl upright in the lower rack (no other dishes in the dishwasher) fill the bowl with vinegar and run a normal cycle. The vinegar will wash out and clean some of the deposits away. If residue is still around run a second cycle of the vinegar wash.

- Lemi-Shine
- Finish Dishwasher Cleaner
- Glisten
- Glass Magic

Here are some links to other dishwasher tips I have put together.

Blinking Clean Light

Poor washing on the top rack or noisy

General Dishwasher Cleaning

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1 Answer

dishes are coming out very filmy.


A couple of things could be causing this. I will create a list here of the most common causes, if they do not help I have attached a link at the end to some other tips I put together.

- Be sure your rinse aid dispenser is full, if you have run out it could cause filming

- Looks for suds in the dishwasher, if present it would indicate that some foreign detergent like dawn or other sudsing detergent got in there. If this happens run a short cycle or two adding a bit of vinegar or cooking oil to help dissolve the suds.

- Use the amount of detergent for your water quality. In the spring as the water table rises the amount of calcium and magnesium changes. They can cause filming, if you water is soft use less detergent, if hard use a little more and you may have to use an additive (see link)

Let me know if this helps at all, your honest feedback to me would be appreciated.



May 03, 2010 | KitchenAid 24 in. KUDI01FLSS Stainless...

2 Answers

water runs continuosly...I have well water and when this occurs, the drinking water tap just trickles...and also the water filter life is greatly reduced

If it's like my well water was there was sand in the water which would lodge in the water inlet valve where the water supply connects to the fridge on the back. It prevents the valve from closing completely. Sometimes it would clear it's self if you keep cutting it on and off till it stops. I also had the same problem with the cold water in the washer. Replacing the valve didn't help because the sand kept coming. Some type of filter is needed in the water line before the fridge is needed.

Jan 16, 2010 | GE Monogram ZDI15C Automatic Icemaker

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