mobo, i'm pretty sure it doesn't do any good to 'rub it in'. due to the tension on the string, and what happens when the bow is shot, you can't keep wax down in there. heating the string when applying only allows any wax that is in there to melt and run away from the tension in the center of the string, instead of melting into it. the idea, as it was explained to me, is that the silicon will seep out of the wax and into the fibers of the strands. supposedly you can wax your servings and the silicon will seep thru the serving and into the string fibers below.
also, you tear the fibers on the outer strands w/ vigorous rubbing.
that's my latest theory anyway, and its lasted pretty long so far.

bigpapascout, will you come over and take care of my bow that well?that sounds like very nice treatment.