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• one way is to measure the electricity used with a plug-in meter that fits between the wall socket and the appliance, once before the usage, once after. When the amount of electricity used goes down, one may infer that the element has been cleaned and that this accounts for the drop in power used and hence money saved. Also the cleaning power is evident as everything gleams and bad odours flee away. By amarula4 - Walsall - 05 July 2012