In the newly bought power mixer are generally not "open", should be first in the coarse grinding stone grinding out the power mixer, and then in the fine grinding stone grinding to sharp; with dull power mixer, if first put in a concentration of 10% salt water soak for a few moments, and then grinding, while grinding side dripping with salt water, so that the power mixer grinding both fast, and grinding sharp; power mixer with dull, try not to be on the edge of the cylinder or the bottom of the bowl on the grinding and scraping, so as not to damage the blade; power mixer after use, to insert in the power mixer frame, do not throw, to avoid touching damage to the edge; power mixer to be often sharpened, sharpening to do the same number of times positive and negative. Grind both ends with the middle; power mixer are generally placed in a ventilated, dry place, away from water and gas, etc.