Place a cup of white vinegar on the top rack—no detergent—and run a cleaning cycle once a month. This strips accumulated scale from the machine’s internal pipes.
It’s like a juice cleanse for your dishwasher. Afterward, run a regular cycle with detergent to reset the pH. You’ll see a difference on the very next load.
White Residue On Dishwasher at Rodney Swisher blog
Fun Fact: Water Hardness Levels
The US Geological Survey rates water hardness on a scale of 1 to 10 grains per gallon. If you exceed 7 grains, you are legally in “very hard” territory—and literally in mineral-mugshot country.
You can buy a simple test strip online for a few dollars. Knowing your exact number is like having a cheat code for your appliance manual.
