The surface of the plastic is VERY smooth, giving it excellent non-stick properties. To maintain these properties, do not use sharp tools or objects to work on or clean the drying trays. Do not put them in the dishwasher, as salt attacks smooth surfaces. The drying mats have no joints or holes – they can be filled with a little dishwater and stacked on top of each other to soak, making them easy to clean after a short time.
If you are processing strongly coloured foods (beetroot, tomatoes, carrots) and want to avoid discolouration of the drying trays, we recommend cutting baking paper to size. Discolouration caused by carrots, for example, is harmless but can usually be removed with a little oil and/or baking powder.