Operating Instructions65Safety When Cleaning• For safety reasons do not clean the appliance with a steam jet or highpressure cleaner.• Clean the hob in accordance with the maintenance and cleaninginstructions in this manual.How to Avoid Damage to Your Appliance• Do not use the hob as a work surface or for storage.• Do not use the cooking zones with empty pans, or without pans.• Ceramic glass is insensitive to temperature shock and very robust,however it is not unbreakable. Hard and sharp objects, in particular,can damage the cooking surface if they fall on it.• Do not use cast iron pans or pans with damaged bases that are roughor burred. Scratching may occur when the pans are slid.• Do not place any pans on the hob frame. Scratching may occur or thepaint damaged.• Ensure that liquids containing acids, e.g. vinegar, lemon or scaleremover do not come into contact with the hob frame, otherwisematt spots will appear.• If sugar or a dish containing sugar comes into contact with a hotcooking zone and then melts, remove the soiling immediately whilststill hot using a scraper. If it cools, damage to the surface may occuron removal.• Keep all items and materials that can melt away from the ceramicglass surface, e.g. plastics, aluminium foil, or oven foils. If somethingof this nature should melt onto the ceramic glass surface, it must alsobe removed immediately using the scraper.• If you wish to use special types of pan (e.g. a pressure cooker, simme-ring pan, wok, etc.), please observe the manufacturer's instructions.• Avoid boiling pans dry. The bases could be irreparably damaged in theprocess and the glass ceramic cooking surface also damaged.