When your gear is starting to soak up water instead of repelling it then you know it's time for a cleaning. The NIKWAX Down Wash works great at breakaing down those dirt and oil particles and cleaning out those pores to restore the DWR finish on all Down gear. You always want to keep up on your Down gear and clean them periodically. Dirt attracts water, if the fabric absorbs trhe water, rain and condensation can easily transfer into the down and more or less ruin it. It's quick and simple and will keep your gear protected for its whole life. Stay dry, stay clean, stay new!