Some tips for burning your candles properly:

1. The first burning of the wax and each subsequent burning should last 3-4 hours until the entire surface of the wax is melted. So the next times it will burn more and more correctly.  
2. Make sure to cut the wick 0,5 cm before each burning.cmif the wick is longer it will create a large flame and smoke. 
3. Most of us when we want to blow out a candle blow it out, a quick way yes but not the right way. Blowing gives off a lot of smoke which diffuses into the atmosphere and “covers” the nice fragrance that was there, but of course there is also the risk of a spark being thrown out of the container. In this case you could get a wax extinguisher or alternatively use a match or whatever else you have available at home in this form to dip the wick into the wax to extinguish it and then bring it back to the surface.  
4. When lighting candles, make sure to place them on a stable surface and away from air currents such as air condition, as well as away from children and pets.  
5. And of course we don't burn a candle to the end! Extinguish 1cm before it reaches the base of the container because if there is not enough wax to absorb the heat then there is a risk of overheating and cracking.