For light soiling. Place approx. 400 ml of water and a little washing-up liquid in the cooking chamber and select the cleaning program. The environmentally friendly cleaning system softens burnt-in residues so that they can then be wiped off much more easily was ordered from us and sent by us to a customer. After receiving it, the customer decided on a different filter and returned it to us. The hybrid filter BHF 150+ is unused and in perfect new condition; it was simply inspected by the customer and returned to us. Of course, all accessories are complete. The guarantee is 24 months.