You may not care about what the inside of your dishwasher looks like, as long as it's getting the dishes clean. But if you're a little picky like me, or especially if you're selling your home, you want the inside to sparkle just as much as your dishes. It's the little things that buyers are looking for, and a clean dishwasher can make the appliance look newer and seem more efficient. Not to mention, any cleaning tips that require very little effort on my part are definitely worth it.
I got this tip from the television show Get It Sold, but homeowners (and mothers!) have been doing this for decades.
Lemonade! When life gives you rust stains... use lemonade! All you have to do is empty a packet (about 2-3 tablespoons) of lemonade mix into the soap dispenser, and run the empty dishwasher on a regular cycle. And there you have it. I used a Kool-Aid packet of lemonade mix myself.
It's the citric acid that does the work. In fact, you can find at your local hardware and appliance store a packet of "special" citric acid dishwasher cleaner for about $12. Completely unnecessary. Use the Kool-Aid! It's only $0.25 and you probably already have it in your cupboard.
Here are my before and after photos. The rust didn't completely disappear with just the wash, but the wash did loosen it enough to where I could simply wipe it off with a rag.
This will also work if you have well water that is turning the entire interior of your dishwasher orange, but you may have to run a few cycles instead of just the one.
Not to mention it'll make your kitchen smell lemony fresh!