I have used these candles for years. I recommend that you find a quiet clear space and charge the candle. You do so by envisioning what you want to manifest out of the candle.
I then recommend you saying the saying on the candle once before you light it out loud. You don not have to repeat every time you burn the candle after the first time.
If you have to extinguish the candle, make sure to not blow out the candle or snuff it out. It is my experience that when you do so, you’re blowing what you want away from you. I recommend fanning it out with something.