In reply to daveaubrey:
> (In reply to SARS)
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> get some nikwax techwash. You can get it from any outdoor store. The shop i work in sells it for 4.49. There'll be a bunch of instructions on the back but here're the basics: Drain out the detergent residue from your machine (normal detergents harm the membrane). 40 degree synthetic wash with 3 capfuls of the techwash. you can wash 2 items at once. Ideally you'd want to do it every 2-6 months. I'd say from what you're using it for you'd want to do every 2 or 3.
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> Hope this helps,
>
> Dave
A cheaper and just as good option is to pick up some dri-pak liquid soap from most large Tescos (other supermarkets may stock it too)
The detergent doesn't damage the membrane. They contain a wetting agent to make the water and cleaning agent penetrate the fabric. This wetting agent stops the DWR from binding to the fabric. The DWR is the layer that helps water bead off and helps maintain breathability. It's what you apply when you "re-proof" your jacket.