How do I attach a wick to a jar?
Short answer
Use a heat-rated double-sided wick sticker on a dust-free glass, not a drop of wax.
Explanation
A drop of wax is the same wax as the rest of the candle, so it melts when you pour and the wick can float free. Wipe dust off the jar with a tissue first, but don't degrease it. Hold the wick upright and centered with chopsticks or a wick holder while the wax sets.
Source: The Big Book of Sweet Dessert Candles — How to Attach a Candle Wick to a Jar or Glass