For everyday care, please use neutral cleaning agents and water only. To remove stubborn limescale deposits, you can use a cleaning agent containing citric acid. Avoid cleaning agents containing the following chemicals:
Acetic acid (also known as ethanoic acid or acidum aceticum)
Hydrochloric acid (muriatic acid, acidum hydrochloricum)
Formic acid (methanoic acid, formylic acid, metacarbonic acid, hydrogen carboxylic acid)
Sodium hypochlorite (bleach, sodium oxychloride)
Phosphoric acid (E 338).
Stainless steel fittings may be damaged by cleaning agents containing hydrofluoric acid and chlorine.