Sorry for the delay Balladeer. kbyers explained exactly what I was referring to. By waxing the mono line, you have a lot more control of setting the hook with a bobber. Very little water drag on your line. However, there are times when waxed (floating) line is a disadvantage. There is one specific hole I fish where you get a lot more bobber drops if you can swim your jig by letting the current and sunken line sweep across the river. I would try and word it better, but it's just one of those things you have to be there to understand it.