To me, there's nothing better than getting into freshly washed bed sheets, but I recently discovered that my newly cleaned bedding was getting dirty again after just one night.Why? According to infection prevention expert Dr. Shanina C. Knighton, PhD, RN, CIC, bringing these three key everyday items into bed at night can turn freshly washed sheets into a hotbed of bacteria. allergens, and germs.So if you want cleaner bed sheets for longer, here are the three specific items Dr. Knighton keeps out of her bed – and would advise you to, too...What an infection expert bans from her bedroom for cleaner sheetsTo help keep your sheets cleaner for longer, Dr. Knighton recommends you keep these three thinks far away from your bed.1. Your phoneWhether it's for a sneaky pre-bed scroll or so you can check your messages first thing, many of us keep our phone close to hand at bedtime. But Dr. Knighton says that it's a magnet for things that have no place in the bedroom."People bring a filthy phone to bed, the same phone that has been on restaurant tables, in bathrooms, and in their hands all day, and they set it on the pillow or the sheets," explains Dr. Knighton. "A smartphone surface is one of the dirtiest things most people own, and they bring it right up to where they sleep."