I as well used my flat beater once and washed it in the dishwasher which destroyed the topcoat of whatever was on there! Now there is black residue on everything! I’m worried that the topcoat was toxic and coming off in my food! And it’s not truly stainless steel! I’m very upset.  I trusted kitchenaid for over two decades and I’m seeing a big upset in quality as a consumer.  How was this overlooked in focus groups??? I’m worried what has gotten into my food!