Ideally, a non-aggressive cleaning agent or washing liquid should be used for cleaning with the window cleaning robot in order to achieve a more intensive cleaning effect. The appliance sprays about 1 ml of water mist every 5 seconds, which can be combined with such a product to remove even stubborn stains. Special aggressive cleaning agents are not required and could damage the appliance or the window surface. High-quality microfibre cloths, which are included in the scope of delivery, support gentle and effective cleaning without streaking.