Comforter support!!? I have a down comforter and it hasn't been wash in a...

I have a down comforter and it hasn't been wash in a while. I just wash it on gentle and when I took it out it smelled bad and looked close to it had mold inside of it. Is there any hope for this one or do I call for a whole new one? How can I prevent it from going on agian??Anything you can suggest is helpful.

Thanks for the help!!
Where do i put my textile softener contained...
Answers:    That is what happen when you wash down. Best to take them to the professional cleaners.
For a science project we enjoy you verbs...
ummm Im gonna read out no. down comforters you should take to the dry cleaners to get verbs. It only costs about 20 bucks!