I did my Endura Stealth, Endura eVent trousers and Gore Cosmo a couple of weeks ago – and they're all just like new!
1 – Make sure your washing machine has NO detergent/conditioner residue by running an empty wash, on the highest temperature.
2 – Throw clothing in the wash with Granger's 30°C cleaner.
3 – Repeat step 2 with Granger's 30°C proofer.
Leave to drip-dry.
Don't tumble-dry the Stealth. The 30°C proofer doesn't need high temperatures to activate it, and the Stealth is not made to be tumble-dried.
Enjoy : )