What kind of water is recommended to use with the Optima Steamer?

Soft water, it should not contain too much minerals like calcium, iron, sodium and other minerals. The water should contain less than 40ppm of total dissolved minerals. A TDS measurer marks this number, and if the number reaches or exceeds 40 than the water has to be pre-filtered before filling up the deposits of the machine. We recommend osmosis filters and provide it with the machine if it is necessary. The water temperature has to be over 5°C. The water quality can highly affect the lifespan and efficiency of the machinery. Never use distilled water or pour chemical products to the water deposit.