Why Are Craft Candles Easily Blown Out?

Light a candle, and observe from the side, you can see that the wick and the flame are not close together, there is still a small distance between them, which shows that when the craft candle burns, the wick does not burn, in fact, the flammable gas is in the combustion.
Where did the flammable gas come from? In fact, flammable gases are produced when wax is decomposed by heat.
Let's take a look at the burning process of a candle. When waxing, the wax melts first, forming a small wax pool at the candle wick. With the help of capillary action, the wax liquid is continuously sucked up, decomposes into combustible gas on the upper part of the craft candle wick, and then burns.
The wax vapor of craft candles is continuously decomposed to make the candle burn. When you blow it with your mouth, the flame and combustible gas are separated by the air flow, cutting off the back path, and the candle will naturally go out.