Hello, I am a new soap maker working out recipes. I have a few batches that came out with all the properties I want except the odor. They smell pretty at first but after a few times of use they smell, having lost all their pretty smell. One in particular I scent with eucalyptus, lemongrass, and bergamot. I made the basic recipe with crisco, coconut oil, palm, olive, and 1 oz of sweet almond and castor. They have sort of a funky odor. All ingredients were purchased new so I know it can't be that they were dated. How much EO should I have added? I added about 3/4 oz for a 2-3 lb batch. Would the EO cover the smell if I added more?