How to clean the sleeping bag?

 　　Sleeping bags have become more and more fashionable, including baby sleeping bags and adult sleeping bags. But, how to clean a sleeping bag?

　　The sleeping bags made of chemical fiber cotton or fleece can be cleaned directly by hands. Certainly, you can choose machines wash if your washing machine is big enough. Try to put it flat or hang it on multiple places when your are drying the sleeping bag in order to avoid transitional sag. According to the advice given by experts, the cleaning of the down sleeping bags is once every four years. It is forbidden to use any alkaline detergent during the cleaning.