| 摘要 |
<p>The invention concerns a method for cleaning articles in a dish washing machine comprising an alkaline and an acidic cleaning step and at least one additional alkaline cleaning step, characterized in that a) in a hood dish washing machine there is a first alkaline cleaning step with an aqueous cleaning solution having a pH-value higher than 9, b) the first alkaline cleaning step is followed by a first acidic cleaning step with an aqueous cleaning solution having a pH-value lower than 5. c) the first acidic cleaning step is followed by at least a second alkaline cleaning step with an aqueous cleaning solution having a pH-value higher than 9.</p> |
