You CAN Put Your Keyboard in the Dishwasher
This is an old practice -- clean out a dirty keyboard by washing it. I read of this practice at least 8 years ago, and it's probably older.
Surprisingly it's said to work well for a variety of electronics, but not motors of any kind. Don't rapid-dry the keyboard. Fan drying is fine. Most people don't remove the keys, but older or somewhat loose keys may fall off and should be removed and stored prior to the dishwasher. Some say to avoid soap, but most agree a small amount of standard dishwasher soap works well.
The drying stage can take a few days.