Cooking at volume is what the HDS8857UC is for. The HDS8857UC is a freestanding 36-inch range from the 800 Series, dual fuel, with six gas burners over a 3.7 cu ft electric oven. No other Bosch 36-inch dual fuel range has a larger cavity. In a busy kitchen, heavy use exposes wear faster than light use does.
The wear shows in three spots: the door hinges, the bearing of the convection fan, and the caps on whichever two burners you use every day, which tire faster than the other four. Grease also builds up on the oven door glass over years of roasting and can haze it.
If you cook daily, an occasional inspection pays off. Early attention to the hinges, door seal, fan and burner parts keeps the range performing the way it did new. Daily use is not what ages an oven; thermal cycling and rough door handling are.
The door hinges and seal, the fan, and the caps and crowns on the burners you rely on most. Small problems found early stay small.
Not by itself. Thermal cycling and rough door handling are what age an oven, so a range used properly every day may well outlast one that is used hard but only occasionally.
It is a grease film that builds over years of roasting and settles on the glass. It builds slowly and is mostly cosmetic, though it can make the food harder to see inside the oven.
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