1. Freeze the wax of the candle
The cold causes the wax to harden and breathe, which facilitates its elimination, hence the old trick of using ice cubes to take out the carpet wax. Use a butter knife, or a spoon if the wax is soft, to break the large wax pieces that remain in the container if the bottle has a narrow mouth. Place the candle in the freezer for several hours or until it freezes. The wax must leave the container, but you can also loosen it with a butter knife if necessary. It scrapes any residue and then cleanses the container with soap and water.
2. Use boiling water
You can also use hot water to remove wax. Place the candle on a protected surface with a towel or newspaper. Use a knife or spoon to remove as much wax as possible. Pour boiling water into the container, leaving space at the top (if your candle is made of a soft wax, you can use hot water that does not boil). The boiling water will melt the wax and float towards the top. Let the water cool and remove the wax. Strain the water to get rid of the small pieces of wax, be careful not to pour wax for the drain to prevent it from being covered. Scrape the remaining wax and limp it with soap and water.
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3. Use the oven
This method works well if you have several containers to clean at the same time. Scrape the greatest amount of wax that you can with a knife or butter spoon. Heat the oven to 180 degrees and hold a baking sheet that has an edge with aluminum foil or one or two layers of parchment paper. Accommodate the candles face down in the pan and place the pan in the oven. The wax will melt in about 15 minutes. Remove the pan and put it on a heat proof surface. Take the container with a towel or grip and clean the interior with a paper napkin. Let the container cool and then clean with soap and water.