7 Washing Liquid detergent and a delayed start Detergent dosage If a delayed start has been selected, after loading the washing the liquid deter- gent should be added to a dosing aid (e.g. ball). It is important that the liquid detergent does not spill onto the washing during the delayed start period, otherwise the washing could be damaged through a possible chemical reac- tion. Adding too much washing detergent can cause excess foaming, giving a poor wash result and, in the worst case, causing damage to the appliance.  The amount of detergent required depends on the degree of soiling as well as the wash load, the hardness of the water and the product being used. Follow the detergent manufacturer’s dosing instructions. The hardness of the water is measured using the French degree of water hard- ness (° fH) and is subdivided into three categories: • Soft 0 °fH to 15 °fH • Medium 15 °fH to 25 °fH • Hard over 25 °fH (NB Use water softener to reduce amount of washing detergent required.) The local water authorities can provide information on the level of water hard- ness in your area. 35