Selecting the correct Kick Wax
Establish a starting point. Note the air temperature in the shade. Check the wax tins for temperature range, and apply 3 or 4 layers. For the softer warm waxes it helps to do this outside at colder temperatures for really thin, smooth layers. Next, try the skis. It's a good idea to take along one or two harder (colder) waxes and one or two softer (warmer) waxes on each side of the wax that was initially selected, and a cork. Ski far enough to give the wax a chance to become "conditioned" by the snow. Usually during the first hundred meters or so the wax might feel a bit slippery, which is normal. If your first choice is working well, then the only consideration is possibly adding more layers of the same wax if it is a long race. 
If the skis are slippery: 
    - Apply more layers of the same wax, possibly extend the wax layer farther in front of the kick wax zone. A thicker layer, “cushion” of wax is created that allows the snow to “grip” the wax better. 
 
- If the wax still does not give a proper grip (it is too hard/cold), apply a warmer temperature wax on top of the wax already on the skis. If this solves the problem then apply a couple more layers of the same warmer wax. 
 
- With a too soft/warm wax on the skis, ice can start to form, when the snow is new or fine-grained. This gives slippery skis and in turn, poor glide.  Remove ice by thoroughly corking the wax.  After removing the ice apply a few layers of a harder wax. If the ice is impossible to remove this way, then scrape off the wax with a plexi scraper. Put on a harder wax and cork smooth. 
If the skis are slow and feel “draggy”: 
    - Remove or cover the possibly too soft wax with a colder temperature wax. 
 
- Shorten the kick wax zone. If wax has been applied significantly longer than recommended the speed and feeling will be reduced.  Shorten the wax layer by scraping off.