I've owned a kitchenaid mixer since 2018. I use it almost daily and always handwashed my parts. We are currently dealing with a boil water order so I figured since it's dishwasher safe, may as well toss it in. It tarnished and all the coating came off. After a couple washes in the dishwasher, it no longer will go onto my mixer. It's like the lubricant or something is gone. My other accessories like the beater and dough hook go on with no problem. Very upset and disappointed as I use this so often.  Works great, just don't put it in your dishwasher