23For correct hob useTo ensure lower gas consumption and better efficiency, only use flat bottom pots/pans ofsize suitable for the rings, as indicated in the table at the bottom of the page. Also, as soonas a liquid starts to boil, lower the flame enough to keep it on the boil.Carefully watch over your food during cooking with fats or oils, because these substancescan catch fire when very hot.Do not use aluminium foil to protect the hob during use.Make sure pots/pans do not protrude over the edges of the hob and that they are placedcentrally on the rings in order to obtain lower gas consumption.Always lower the flame or turn it off before removing pots/pans from the rings.Do not place unstable or deformed pots/pans on the rings: they could tip over or spill theircontents, causing accidents.Pots must not occupy any part of the control zone.Cleaning and maintenanceBurner min. diameter max. diameterTriple crown 180 mm 260 mmLarge (rapid) 160 mm 260 mmMedium (semirapid ) 120 mm 220 mmSmall (auxiliary) 80 mm 160 mmCLEANING AND MAINTENANCEBefore carrying out any operation, disconnect the appliance from the power supply andallow it to cool.General cleaningClean the hob regularly with a soft cloth soaked in lukewarm water and a little liquiddetergent. Do not use the following products:- household detergents or bleaches;- soapy scouring pads unsuitable for non-stick pots/pans;- steel wool;- bath or sink stain removers.If the hob is very dirty, use specific products available on the market. Do not leave acid or alkaline substances (e.g. vinegar, salt, lemon juice, etc.) on the hob.If you notice any breakage or cracks on the glass top, immediately disconnect the applianceto avoid risk of electric shocks, contact an After-Sales Service Centre and do not use theappliance until it is repaired.