Observe the burning of the ball candle especially closely when the candle has burned past its widest point. Because of its round shape, this candle is prone to draining. However, it is possible to burn the ball candle until the end without draining.
In this case, please make sure that the wick of the ball candle stays short (approx. 0.5-1 cm) and also follow other instructions related to burning the candle. In terms of candle burning, the most important thing is the right room temperature and a draft-free place.