3. If the wax adhere to the lamp bulb, scrape out it with a plastic card and wipe with a paper towel. (you must be careful because the lamp bulb can be wounded scratching with a knife or sharp metal on the surface)
4. If you use and melt a herb candle repeatedly (4 to 5 times) the candle doesn’t have any more fragrance. Then, pour the rest melted wax into a empty container and switch on the candle warmer then some portions of unmelted wax layer start melting with a new fragrance.