Waxing becomes more important as temperatures rise because the subtleties associated with stride length, kick wax surface length, wax application technique all play into your ability to maintain stride when course manoeuvrability becomes restricted. You’ll find that you can really blaze in moderate temperatures if you’ve prepared your skis effectively for the conditions.
If it’s old snow, you’re using glister as your kick wax. This stuff is gooey and you don’t need that much. In fact, I recommend that you shorten from your cold weather kick wax length because of the power of this stuff. You want to be careful that you don’t get it in contact with your glide bases because it’s a nuisance to remove while anticipating your ski day. On course it’s best to take breaks during the flats since restart will be easier since glister wants to adhere while stationery. Take full advantage of the slick conditions by extending even further during stride. Aim for a 90 degree finish at the knee with aggressive poling. On a good track with nicely prepared skis, these are the days where you’re close to the athletic zone actualizing the benefits of this aerobic winter sport.
Don’t despair, “skin skis” (google it) are now all the rage allowing you to bypass the kick wax procedure should you want to just get out on the trails with no fuss.