I have an Arc'teryx Theta AR jacket, 2007 model constructed with Gore-Tex XCR fabric.
I took the jacket on a month-long skiing holiday, and despite my best efforts to take good care of the jacket (and keep myself clean), it has come to show a little grime.
It wouldn't normally be noticeable, but the inside layer of the jacket is a light gray color, so the collar and armpit areas are a little discolored (i.e., yellow--I know, ewww!). (The armpit thing is news to me--I used antiperspirant regularly and had 2 layers of material separating skin from jacket. Is yellowing due to the antiperspirant or the sweat?).
Anyway, I am looking for suggestions on how to clean my jacket. I am considering Nikwax Tech Wash. But if there is a better alternative out there I am listening.
Thanks in advance.