When you light your candle for the first time, always allow the wax to burn so that it melts across the entire surface to the edges of the container.
Keep your burn times to no more than 3 hours at a time. This will ensure that not all of the wax will become heated which causes your wick to dislodge.
Try to ensure that your wick is always kept to 5mm long at all times. Trim your wick every 3 hours of burn time. When trimming, always extinguish the flame and let the candle cool down.
Always monitor the amount of remaining wax in a candle container. Once the wax falls below the half-inch mark (1.27 centimetres), discontinue use.