Do you often clean bedding? 1. Bed sheets and duvets: washed once a week According to reports, paper that has not been washed for 10 days may leave 5.5 pounds of sweat. This bed sheet is a paradise for mites and bacteria. 2. Pillow towel, pillowcase: wash once a week Pillows are easily contaminated with dandruff, dust mites, fungi, bacteria and oil pollution on the scalp and skin. If you clean...