The general expert recommendation is to wash bed sheets once per week. This frequency helps remove dust mites, sweat, dead skin cells, body oils, allergens, and bacteria that accumulate in bedding, promoting better sleep and hygiene. However, if you have allergies, asthma, sensitive skin, or share your bed with pets, washing sheets every three to four days might be more beneficial. During hot weather or summer months, more frequent washing is also advised due to increased sweating. If weekly washing is not practical, it is recommended to have more than one set of sheets to change regularly. Washing instructions typically suggest using warm or hot water (depending on fabric care instructions) with a gentle detergent, and drying sheets thoroughly to prevent mold and mildew growth.