We recommend that the tealight burn out in one total time period, this way it will reach its maximum burning time. If the tealight has used up more than half of the wax, let it burn completely, otherwise you will not be able to light it. The reason for this is that the wax cannot be heated enough to be completely liquefied.
The temperature of the surface on which the tealight is placed affects the way the tealight burns. Tealights on cold surfaces (concrete, marble) can develop a small ring of unmelted wax while burning. Therefore, it is not recommended to place tealights, for example, on cold window sills or cold metal furniture. It is better to light it in the middle of a warmer room (room temperature higher than 17 ° C), as a warm candle will be able to use up all the wax before it burns out. A cold environment means that the candle cannot sustain enough heat to be able to melt all the wax to the edge of the candle.