How to properly maintain mattress?
In the newly bought mattress are generally not "open", should be first in the coarse grinding stone grinding out the mattress, and then in the fine grinding stone grinding to sharp; with dull mattress, 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 mattress grinding both fast, and grinding sharp; mattress 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; mattress after use, to insert in the mattress frame, do not throw, to avoid touching damage to the edge; mattress to be often sharpened, sharpening to do the same number of times positive and negative. Grind both ends with the middle; mattress are generally placed in a ventilated, dry place, away from water and gas, etc.