The Thermomix ® is made from rust-proof stainless steel, the same as all the stainless steel pans that you use in your kitchen. If you notice that there are stains in the bowl, these may have been caused by the following:
- If the mixing bowl is not cleaned 100% after use, then the next time it is used, tiny residues can “bake on”. This may look like rust and needs to be cleaned off.
- Other metallic cleaning materials (like steel wool, for example) can get fixed to the stainless steel in the bowl and then rust themselves. This is also true for other metal kitchen utensils, so please don’t ever scrape the bowl with metallic objects like spoons or knives.
- The effects of salt and water over a prolonged period of time can damage the stainless steel. This is why you shouldn’t store cooked dishes in the mixing bowl and why the bowl, knife and seal need to be cleaned and dried thoroughly after you have used them.
- When steaming, the minerals dissolved in the water, especially lime, remain in the bowl. As before, the bowl, knife and seal need to be cleaned and dried thoroughly after you have finished cooking.
- When cooking starchy foods, such as potatoes or noodles, for example, iridescent colored stains can appear in the bowl. This has nothing to do with corrosion, it’s a kind of coating.
If you notice any stains in the bowl, you can remove them by thoroughly cleaning it. Liquid stainless steel cleaners and pads can also be helpful. However, it is important that the cleaner is definitely suitable for stainless steel.
Cleaning the bowl with a vinegar solution can also help. To do this, please mix 1000 ml vinegar (can also be 250 ml vinegar essence and 750 ml water) with ¼ teaspoon detergent, pour this into the bowl and stir the solution on level 1, at 50°C. Then leave the solution to work for at least 1 hour – or even overnight. After that, rinse the bowl throughly with clean water several times.