For best performance, it is a good idea to keep your waterproof/breathable Gore-Tex® or Conduit™ shell clean and its DWR (durable water repellent) finish freshly charged. This means keeping oil and grease away from the garment, washing it when it gets dirty and reapplying its DWR finish.Shells can be machine-washed in warm (not hot) water using regular powdered laundry detergent. Wash in a front-loading washing machine only. Do not use Woolite, other cleaners with lanolin (or any other oil), or fabric softener. Put the garment through at least two rinse cycles, as the detergent can interact with the DWR finish and needs to be totally rinsed out of the material.After the shell has been washed, reapply the DWR finish while the garment is still damp. The heat of the dryer will help set the DWR finish into the fabric. Tumble dry on medium heat.We recommend you re-treat your shell at the beginning of your wet weather season, and at least once during the season. However, if you are washing your shell often, we recommend re-treating the DWR finish more frequently. For best results, use spray-on, rather than wash-in, products. Two brands we suggest are NikWax and Revivex from W.L. Gore. Follow the manufacturer's instructions for application. Once you have successfully cleaned and refinished your shell, it should work as well as new again.Three-Layer TipIf the lining of your three-layer waterproof/breathable garment becomes coated with condensed moisture when you're working so hard the vapor can't be transported out fast enough, try this: Turn the garment inside out and give it a good shake. This will get rid of most of the moisture and return you to a relatively dry state.