Reproofing

Most technical 'proofing' fabrics are best and most simply cleaned in the washing machine using a non-bio detergent, no fabric softener (this is a big destroyer of waterproof and breathable membranes as it clogs up the pores), and then dried with a combination of air and/or in the tumble drier.

Products like Graingers etc are (expensive?) soaps and water repellents which give a visual impression of water beading off of the fabric. IMO the key is tumble drying which reactivates the (any residual) waterproof/repellent coating. If you don't have a tumble drier, use an iron on a low setting.

I have been cleaning and reviving ski wear using these techniques and it works a treat.
 
No.

I wash them in liquid soap and then use NikWax TX direct

Re tumble drying - read the manufacturers instructions not all can be tumble dried and check for 'untaped ' seams. I ruined one jacket by not doing so.
 
Washed with Nikwak today.
Once dry how long do you tumble dry for .
Friend has one so will pop round next week to finish off.
 
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