Due to the oxygen that my husband is now on to help him get the COPD under control, and help him battle the cancer as well this, Witch has had to take to using the electric wax warmers to infusion our home with the warm wax scents I love. Here's a tip for those who also use the electric candle warmers. When you are ready to empty and/or change the wax put the flat dish in the freezer for 10 minutes. The wax will harden enough you can easily pop it out of the dish :)