Place wax in the top and a tealight in the opening
To remove used waxlight the tealight in theburner for a minute or two and push the old wax out or if the wax is full melted you can let is absorb into a couple of cotton pads.
Do not use any objects to try and remove the wax ( knife, scissors, spoons etc) as thiswilldamage the top of the burner.
