In reply to neuromancer:
I asked Paramo whether you can use Direct TX Wash In since the Paramo system relies on a wicking lining to "pump" the sweat away and I always thought washing with the proofer would coat the inside and stop it pumping since it should bead instead.
They said you can wash with a detergent or dry clean if dirty and wets out, then Wash with Nikwax Wash and then Reproof:
"Iād suggest that you can use a non-biological detergent to wash the jackets or have them dry cleaned ā but after doing either of these options you will then need to re-proof in the usual manner with Tech Wash and TX Direct Wash-In."
Tried it but no matter what always end up with damp / wet chest and arms because it doesn't seem to breath.
The only thing that works is a new one, whether Goretex or Paramo, and over time the DWR wears out and TX Wash In might bring back beading but also greatly reduces breathability.
Maybe buying really cheap more often is better.