I got a pair of Rossi Zynex skates back in 2009 to have a basic pair for the few days on snow that I have per year. I can’t remember a single time that I was truly happy with the glide, despite all the waxing (storage, warm, cold, you name it) and, most recently, stonegrinding. The grinding was done at REI -maybe not the best option, but choices are limited where I live (NJ) and the guy said they applied the grind to accommodate the “typical” conditions in the Northeast. The ski performs worst in cold temps (below -10C) and soft snow. It crunches and digs in, regardless of the type of wax that’s been put on it. On harder trails in cold weather, while it does not dig in, it crunches like on sandpaper, requiring a huge amount of effort for each step. At warmer temps (above -5C), it’s not great, but at least it allows me to do 20K without passing out. Wax type doesn't seem to matter in warmer temps either.

I kind of understand the digging in part - it appears to be a stiff ski, and on hard trails it pays off in good tracking. However, the part that about not gliding in cold weather is really frustrating. Can it be that these skis are irreparably "warm", with all the effort that I put in trying to make them glide in the cold? Anything else that I should try? For reference, the skis are 190cm, I’m 6ft 2, weigh 185lbs.

Thanks!