I was talking with the owner of shop, also makes awesome strings. But, he said never wax your string. They are waxed when made and by waxing them you are just keeping them tacky and allowing dirt to stick to it, and pushing dirt into the string. The original wax is more than enough. Strings no matter how little shoot I would change minimally every 2 years. Cheap insurance imo.
Also when you are carrying your bow carry it by the riser not the string and if you are strapping to your pack while hiking have something covering the string.
Edit: I always waxed my string but am trialing this tactic to see if it makes any difference. 6 months in shooting 20-40 arrows 5 days a week and string still looks new.