I have found the same thing with the 6006 melts. The scent doesn't last very long. When I mix in some pure soy they last much much longer! I have melts that will last 24 hours or more. But I have found this with the paraffin too, straight they didn't last more than 4-6 hours max and the scent was pretty much gone, but mix in pure soy and they last a full day some longer. I've bought straight paraffin melts from some of the 'big time' melt ladies and her melts are great and in all kinds of cute shapes but they just don't last very long. I use a 25w melter and I've tested in 45w. I always find it funny when I hear people say they don't care for the para-soy melts cuz they don't last as long or whatever. I find they last longer!