I'm also having this issue and I started w/ paraffin and switched to soy. I have just made the decision to switch back to paraffin just because of issues I've had w/ soy lately. I can tell you from my experience (and I'll give you an example: Cotton Candy) that the longer a soy candle sits (sealed up) the stronger the fo gets. It will eventually throw in soy but takes a long time of "curing" IMHO. I had a hard time w/ cotton candy because it is so light, but it sat for two weeks, burned, and threw like crazy! I don't know how much this helps you, but I just wanted to let you know what experience I've had.