Originally Posted by BlackBear74
That string definitely needs wax. Wax acts as a lubricant for the string's individual strands and protects the individual strands as they are rubbing against each other on the shot. That's why you rub it in, so it penetrates the string. The wax shouldn't be stuck on the outside coating the string. This will prevent the 'gumming' up. If your shooting lots, every other session the string should be waxed. It's hard to tell from your pictures, but it looks like your string is just fuzzed. When strands are broken/wore through then your string should be replaced.
As far as replacement standard recommendation is every two to three years depending on the care of the string and how much it was shot. Hunters that don't shoot much during the year can get more longevity out of there string set for sure. I'm also not a fan of just changing a string, best to do the whole set then your bow will be back in spec.
With regards to waxing just use a small amount regularly and ONLY
use your fingers. Heat and friction are really bad for dyneema materials and lead to the premature break down. Also, don't wax your servings. The wax collects dust and dirt which gets into the cam grooves.