Dishwashers are a greenie’s dream: an appliance that works AND is more efficient than doing it the manual way. Several studies show that today’s dishwashers save energy and water overall doing your dishes by hand (not to mention time!).
But that doesn’t mean we can’t optimize its efficiency even further. Armed with some tips I pulled off the internet, I set out to make mine better. Some of it was a little trickier than I thought it would be.
Lower your hot water temperature
When I did my hot water heater audit last year, I noted that I didn’t want to lower the temperature below 120F because I wanted my dishes to be sanitized. Little did I know that most modern dishes have built-in heaters that heat the water to 140F degrees to make sure all the bacteria and mold gets burned off. So lowering my hot water temp has little to no impact on my dishwasher’s sanitary effectiveness. Cool.
Running a full load
In the “duh” category of green tips, the best way to increase dishwasher efficiency is to always run a full load. Figure out who in your family has a talent for stuffing the dishwasher the fullest. My husband is a whiz at fitting more in the dishwasher. Even when I think I’ve totally maxed it out, he’ll fiddle for a bit and magically slide four more bowls in. I think it’s all of those years playing Tetris.
I used to worry about letting dishes hang out in the sink or dishwasher with gross food stuff on them for a few days while I waited for the dishwasher to get full. Sometimes little fuzzy colonies of mold would start to emerge. However, studies show that dishwashers are remarkably efficient at sterilizing these bad boys too.
Don’t Pre-wash
I grew up washing the dishes before I put them in the dishwasher. It was only after I got married that my husband observed me cleaning up one day and offered “Um, you don’t actually have to do that”. I didn’t believe him, but I tried it his way, and lo and behold – the bowls absolutely caked with marinara sauce came out perfectly clean!
Today’s dishwashers are much better at cleaning the gross grit off of your dishes. Save yourself dishwater hands and hot water by just slapping your dishes in the dishwasher. Like I was, you may be surprised at the results.
Air Dry
This suggestion makes perfect sense. Why bother using energy to dry my dishes, when I can just open the door a crack and have them dry overnight anyway? But I was completely stymied by the confusing display of options on my dishwasher. Which one was going to turn off the dry cycle? Look at these buttons – it’s not exactly clear.
I fished out my dishwasher manual which ended up being for a completely different model of dishwasher (huh?). The GE website didn't have the manual for my model. The only thing left to do is experiment.
Turns out turning off “speed dry” is the right thing to do. With this off, the dishwasher will not enter a dry cycle, saving lots of energy. Sometimes bowls or tupperwares in the top rack have a tough time getting dry, but we just let those rack dry a little longer and they’re fine. It’s a minor inconvenience.
My particular dishwasher doesn’t have an “energy saver” mode, but I’ve heard this is the most efficient way to run your dishwasher. Give it a try and let me know how it works for you.
The last set of things I looked into was my dishwashing detergent, but this ended up being such a complex issue, I’m going to save writing about it for tomorrow.
What steps have you taken to optimizing your dishwashing for maximum green-ficiency?