Def wax new balls. I usually wax my plunger at the same time. I used to like to wax the knockers too but that's when I was way younger and was still in the honeymoon phase. I would love to change/wax balls/shooter rod weekely but the older I get I feel like I only do it every couple mounths. Sometimes there is a birthday or anniversary in the mix and they get changed/waxed extra.