Place candle on lid when lit to help protect from sensitive surfaces, and use the lid as a snuffer to extinguish the flame. Let the candle burn long enough to allow the wax melt pool to reach the edges of the glass (2-3 hours). Trim the wick to 0,5 after each burn to allow an equal burn of the wax. Leave 0,5 cm of unmolten wax at the bottom of the glass. Reuse with tealights or for storage.