You can also sprinkle baking soda over the comforter. Harsh detergents can strip the feathers of their natural oils. Royal Majesty Extra Warmth White Goose Feather Down Comforter Down Comforter Comforters House Styles To cut down on the number of times you need to wash your down comforter add a duvet cover over top to keep the oils from your skin from penetrating into the comforter and attracting dirt. How to wash a feather down comforter . Use warm to hot water to kill dust mites and reduce the amount of detergent you use. The first step is to insert your down comforter into the washing machine. Wash light feather beds on your own. Wash the Comforter Set your washer to a delicate setting and use a gentle detergent without bleach. Plus they are breathable which can help to keep you dry and comfortable at night. Use down soap and follow directions. So can you wash a down comforter in the washing machine. Washing a Down Comforter Water Temperature Hot warm or cold. ...