Synthetic comforters and pillows can be machine-washed—usually at 40°C on the delicate cycle with an extra rinse. It’s important not to overload the drum—the comforter must be able to rotate freely, otherwise the detergent won’t be rinsed out. If your washing machine has a capacity of less than 7 kg, it’s better to wash in two loads or use a self-service laundromat with a larger drum.

Down comforters are in a category of their own. Down clumps together during washing and drying—without drying balls (or a few tennis balls), the filling will lose its structure and the comforter will no longer provide even warmth. Drying takes a long time—up to 2–3 hours in a tumble dryer. It’s a good idea to check halfway through to see if the inside is dry yet—damp down increases the risk of mold inside the comforter.

After winter, cotton bedding can be washed at 60°C—this is an effective temperature for freshening it up and getting rid of dust mites. Satin and percale retain their color and texture better at 40°C. Higher temperatures can shorten the lifespan of delicate fabrics.

Winter bedding should be clean and dry before being put away. Even slightly damp fabric stored in a closet for several months is sure to develop mold and an unpleasant odor. Closets with moisture-absorbing inserts help—especially in older apartments without good ventilation.