In candle making "cure" refers to the chemical process that takes place as the wax and fragrance oil bind and incorporate into each other. Think of it like a spaghetti sauce, chili, or a salsa - the flavors (or scents in this case) perform better after they've had some time to meld together with the wax - to "set."
The first thing to do is just to wait before lighting the candle. Most people recommend at least 24-48 hours for a paraffin-based candle, and up to a week for a soy-based candle. But there are things you can do when you are actually making the candle that will help too:
- Make sure to add your fragrance oil in at the right temperature. Follow your wax manufacturer's directions - or for a good starting point, I recommend 180 degrees.
- Be sure to stir! Amazing how many people just plain don't stir enough. Stir the fragrance oil into the wax for at least a full minute - two to be safe.