Hey everyone...looking for my best options as I've never done this. But I have a Sierra Designs Nitro 15 degree down bag. The down was pretty beat last time I used it so I plan on throwing her in the drier on cool with some tennis balls. But I need to do something to renew the condensation barrier. Its a really thin shell, and the last couple times nights i've used it were sleepless, cold, shivering nights. Even in a large shelter, condensation from my breathing seems to compress the bag within the first 3 hours at night. From midnight on...I may as well be using a hospital sheet. I'll be on Rainier again in a couple weeks...and dont feel like shelling out the loot for a new bag right now. ssooooo...

Can I use a product like nikwax? If so how do i do this without affected the loft of the down? Any other products or suggestions?