Down -- made from goose feathers -- is a common filler for comforters, pillows and duvets. Duvets are comforters that work as a bag filled with insulating material, such as down. They are large pieces of bedding and can be a bit difficult to wash. Most manufacturers recommend washing the duvet once a year and to spot clean the duvet between washings to keep it looking its best. Before laundering your duvet, check with the duvet manufacturer's washing instructions.
Turn your washing machine dial to the gentle cycle with a cool water temperature and let the washer drum begin to fill with water. Add 1/4 cup of a gentle washing powder to the water. If your washing machine has a detergent receptacle, add the detergent into it.
Submerge the down duvet into the washing machine. Shut the washer door and let it complete a full cycle. Examine the duvet for detergent residue. You may have to run the duvet through another rinse cycle to remove any remaining detergent residue.
Begin squeezing -- do not twist -- one end of the duvet while working your way downward. Washing machine spin cycles do not always remove all the excess water from the duvet.
Place the down duvet in the dryer and dry on low heat or tumble dry for several hours. Down duvets may take up to 12 hours to dry completely. After a few hours of drying, remove the duvet and shake it to distribute the down. Place the duvet back in the dryer and continue drying.
Many home washing machine models do not feature a large enough capacity to handle down duvets. Consider washing and drying your down duvet at a laundromat to use commercial size washers and dryers.