Technically Acceptable for the Dishwasher...But Too Questionable for Us to Endorse

Broom Ends (and Dust Pans, Scrub Brushes, and Vacuum Attachments)
Why you would: It’s the only way to get them clean.
Why we wouldn't: Ick.
If you're so inclined: Shake loose dust into the trash first, says Shannon Lowe, the Tulsa-based author of the blog rocksinmydryer.typepad.com. Stick brushes and attachments in the silverware basket and broom ends and dust pans on top.

Computer Keyboards
Why you would: Because you spilled coffee on it. A crazy, last-resort attempt to save something that may be ruined, but some techies swear by it. Terry Jarrard, a computer programmer in Collinsville, Oklahoma, has washed his keyboards “at least a half-dozen times and never had a problem.”
Why we wouldn't: We don’t believe in Santa Claus or unicorns, either.
If you're so inclined: Place the keyboard facedown on the top rack, don’t use detergent, and skip the drying cycle. Afterward, unscrew the back, if possible, or pop off the keys (take a picture beforehand so you remember where they go). Air-dry two to five days. Pray the Computer Fairy is looking down on you, then reassemble.

Salmon
Why you would: Because it’s an Internet cliché that happens to work. Impress friends! Make kids laugh!
Why we wouldn't: Our food editors tested this “recipe,” and though the fish did cook, the dishwasher reeked afterward (shocker). Plus, you’re actually cooking the salmon with your crusty dishes and coffee-stained mugs.
If you're so inclined: Bob Blumer's Dishwasher Salmon Recipe 

Still curious? Learn more about The Secret Life of Your Dishwasher .

Or see 14 Who-Knew? Uses for Your Microwave.