Here's a discussion we had a while back that is in the archives. I personally use the recipe with witch hazel, distilled water and F.O. I think the quality of your F.O. will play a big factor in the strength and how long it will last. hth! Brenda http://www.candletech.com/cgi-local/yabb/YaBB.cgi?board=bbrecipes;action=display;num=1089249520