I bought the 6 Quart Kitchenaid hand mixer in 2018. I love it but I recently have been baking a lot because of COVID-19. I use the all different hand attachments I even have the pasta hand attachment. Yesterday I put the flat beater in the dishwasher and had no idea that it was going to come out all tarnished. I am so upset. I went to the KitchenAid manual and read that I can try to clean with an oxidized cleaning agent. I boiled water and vinegar and put the flat beater in it, but it still leaks grey. Then I soaked it in bleach but it still leaks grey. I am very disappointed as I realize that lots of people are having the same problem