Pillowcases generally need washing every three to seven days, while blankets can usually go two to four weeks between washes. Duvet covers may need cleaning every one to two weeks, and protected comforters or duvets every two to three months.
Simple habits can keep bedding fresher longer, such as showering before bed, removing makeup, avoiding food in bed, airing out the bed each morning, and keeping pets away from the mattress. Occasionally vacuuming the mattress can also help reduce dust and allergens.
Always follow the care instructions on your bedding and make sure everything is fully dry before making the bed again. For most households, weekly sheet washing offers a practical balance between cleanliness, comfort, and convenience.