Save Time and Energy: Stop Rinsing Your Dishes Before Dishwasher

I’ve used a dishwasher the wrong way for most of my life. I used to scrape and rinse my dishes before putting them into the dishwasher, which was a waste of time and heated water.

Thanks to my two teenagers, who do most of the dishwasher chores in my house, I’ve finally learned how to load a dishwasher. You simply scrape the big chunks of food off your plates and bowls, then load ’em. Even if you won’t run the dishwasher until the next day, do it. Even if you have dried-on food on your dishes, do it. It works.

I can’t tell you how many times I’ve silently scoffed at my daughter confidently loading long-lost bowls of rock-hard, dried-up food… only to have them come out looking as clean as everything else in the dishwasher. The before and after pics of a random load at my house illustrate this nicely.

Silverware tray before and after
Bottom drawer before and after

Dishwasher manufacturers agree: stop rinsing

Some dishwasher manufacturers are bold enough to tell you not to pre-rinse. Here are snippets from a few user manuals:

Bosch: “Do not pre-wash items with loosely attached soiling. Remove all food particles, bones, toothpicks and excessive grease. Items having burned-on, baked-on or starchy soils may require some pretreatment.”

GE: “No pre-rinsing of normal food soil is required. Scrape off hard soils, including bones, toothpicks, skins, and seeds. Remove leafy vegetables, meat trimmings, and excessive amounts of grease or oil.”

Jennair:  “Scrape food from dishes prior to loading (do not pre-rinse).”

Detergent manufacturers agree: stop rinsing

Dishwasher detergent manufacturers make bold claims about their detergents, too. Cascade says the following about pre-rinsing:

As long as your dishes are properly loaded, even tough, burnt, stuck-on food is broken down so it can be washed away inside your machine. And get this: The enzymes actually work BETTER if you don’t pre-wash your dishes, because without food to attack, their cleaning power is underutilized. By not prewashing, you’ll end up with cleaner dishes while saving time and water, as Cascade and your dishwasher work in unison to eliminate stuck-on food and their residue. Cascade’s enzymes work best when they have something to latch onto – so let the enzymes do the work!”

I use the dishwasher packs sold at Costco under the Kirkland brand. The package says “NO PRE-WASH REQUIRED!”

Kirkland Don't Rinse

And they’re right.

Also, try using less detergent

More detergent usually won’t give you cleaner dishes, but it might cause your glassware to look hazy. If you don’t use dishwasher packs, try using half as much detergent as you currently use to see if your dishes still come out clean. I’ve heard from appliance professionals that one of the more frequent causes of dishwasher problems is caused by people using more detergent than needed.


If you’re like me and you’re used to pre-rinsing your dishes so much that you hardly need a dishwasher, try skipping the pre-rinse for once. You might be pleasantly surprised. And you have the potential to save a lot of time and water.

Written By

Reuben is a second-generation home inspector with a passion for his work. He grew up remodeling homes and learning about carpentry since he was old enough to hold a hammer. Reuben grew up thinking he was going to be a school teacher because he enjoyed teaching others so much. In a sense, that’s a lot of what home inspections are about, so Reuben truly does what he loves. Sharlene has worked with Structure Tech since 2000 and Reuben has been contributing to her blog since 2008.

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