i used parriffin for 7 years of my candle making life and one day i said i think im going to try soy , and i did and never looked back. i love my soy candles. the only problem i ever really had with soy was wicking and frosting and i got that under control. never had a problem with FO throw you just have to buy from suppliers that test their FO in soy and i never had one problem. just my 2 cents.