Nikwax Tech Wash is an effective cleaner that you should use to clean and revitalize the Durable Water Repellency (DWR) of your clothes.
Nikwax Hardshell Clean/Waterproof Duo-Pack - 10 oz each
What is DWR Durable Water Repellency and How to Renew It
Tech wear care how to wash and treat your outdoor clothing
Where are my Nikwax instructions?
How To Waterproof your Technical Apparel with Nikwax
How to Wash and Waterproof a Down Jacket
Nikwax Tech Wash Instructions For Best Results
Confusion about washing (see first comment) : r/arcteryx
How to Wash and Waterproof a Down Jacket
Nikwax Tech Wash & Cotton Proof • Cotton Canvas Waterproofer