IMPORTANT! Note that halogen-based substances - such as chlorine, bromine, iodine and so on - reduce the strength of rust-free stainless steel. DO NOT use chlorine-based solutions (e.g. sodium hypochlorite) Rust-free stainless steel subjected to normal wear acquires a regularly distributed patina. Scouring powders and items such a Scotchbrite or Brillo pads all alter this natural structure. Cleaning: Useful tip: Washing and rinsing down with cold water from the taps fitted to the unit helps prevent the formation of lime scum deposits Natural cleaning substances: Diluted vinegar (20% vinegar / 80 % water) A lemon juice/salt solution is ideal for removing stains Toothpaste is useful for removing encrustations and for grinding down minor scratches Common (non-abrasive) general household and window-cleaning products are also suitable for cleaning stainless steel Care: For surfaces that look brand-new every day, we recommend the use of Franke Multiclean liquid Under Licence of NIRO-Plan AG, Switzerland