The previous candles did not have a good scent throw, so I redid them, adding more scent. I am using a very hard slab wax. I bought it from a local candle shop. He does not usually sell supplies. Anyway, it looks like a paraffin type. But I had some leftover blended wax and I mixed them together to use it up. Can you tell i am new!! Anyway can i also ask you about wicks. I am using LX18 and LX20 How does one know when to increase the wick size for certain scents, if they are heavier. How do u determine that??:undecided Thanks soooo much for your help... Lisa