wow TMswitch06 your really missed the head on this one. First off, to much wax wont slow you down. Wax is used to reple the water. Your skis create friction with the snow and melts the snow. You can never wax your skis to much. I would say for you people in the park wax them every 10 or so days on the hill, but in reality goign on rails is gonna affect the performance of your skis a lot more then waxing them will. So about once a month would be good. If you want performance, your gonna notice the difference every time you wax them. My race skis i wax before every race. Difference bases hold wax differently, my race skis have a race base on them and they can get edge burn after only 3 runs, so you gotta wax accordingly. But serriously if you havent wax your skis in over a year, thats like not changing your oil in your car for over a year.