● The freezer method. This is one of the easiest ways to get every last bit of wax out of a glass candle vessel. Stick the candle in the freezer for at least an hour, then very carefully use a butter knife or spoon to pop up the remaining layer of wax. If it’s not coming out, gently break cracks into it and let the pieces fall out. Once you’ve gotten the majority of the wax out, remove the wick and its holder by lightly tugging it with your fingers. If it’s being stubborn, a pair of pliers will do the trick. Once everything is out, use hot soapy water to remove any residue.
● The hot water method. If there’s no room in your freezer, try the hot water trick. Boil a cup of water, then very carefully pour it into the candle jar. After a few minutes, the wax should either pop up on its own or you can gently jab with a spoon or butter knife to help it loosen. Rinse with soap and hot water.
● Removing the label. If the jar has a label, removal is fairly quick and simple. Use mineral oil and hot soapy water to help lift the adhesive and scrape it off or place it under a warm hair dryer for 30 seconds to a minute, then peel it off.
The above methods can help you get an empty candle vessels quickly.