Wax melts are great value, they last for hours when used, and the scent will linger even after you have finished using your burner.
INSTRUCTIONS AND SAFETY INFORMATION:
Add one or two melts to your oil/tart burner. Do not add any water. Light an unscented tea light underneath. Place on a heatproof surface/heatproof mat away from curtains, drafts and anything flammable. Never leave a burning candle unattended. Keep out of the reach of children and pets. These are not food, so please don't eat them.
To use new melts once the scent has eventually faded, let the wax in your burner cool and harden, enabling you pop out the hard wax to discard it safely. Putting it in the freezer once it's solid can also help you to remove it. Wash your burner dish out and it is ready to use again.