Skis get dirty! Dirt, pollen, diesel soot, tree pitch, lift grease, etc.
I have found this the best way to clean a base without drying it out.
Hot scraping grease doesn't work. You only mix up wax and grease into the base.
After that the wax won't adhere anymore.
Check it out.
https://www.newschoolers.com/videos/watch/863154/Swix-Glide-Wax-Cleaner-Grease-Cleaning-Test