Hello, After using Bosch MUM9DT5S41 several times, we found that there is a problem about "crochet petrisseur". After we stirred the dough, there were a lot of black powder on the roots of "crochet petrisseur". It might be plastic release It came out. Because there is a plastic connector at its root. we believe that this poses a serious harm to the health of the food. Therefore, we hope that you can provide a feasible solution. In addition: "fouet mixeur" and "fouet batteur pro" are made of stainless steel, only "crochet petrisseu" is a composite (aluminized?), why is this. But we see the description on your website is made of stainless steel of. We can provide relevant pictures, but how to deliver them to your website? We have used the warranty options provided on the website, but no one has answered what we should do after 2 weeks。