The "S" in the model number stands for standard clean oven (vs. self clean), so unfortunately, you will have to use a can of Easy Off or similar oven cleaner.
How do I test my oven thermestat? I have it out of the oven, have tested for continuity and I have...
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How do I test my oven thermestat? I have it out of the oven, have tested for continuity and I have none. Do I test it for continuity?
How to remove front glass door to screw up handle which is loose on Hotpoint BS73E Ovenand clean...
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How to remove front glass door to screw up handle which is loose on Hotpoint BS73E Ovenand clean between glasses