I think the quality of the fo makes a difference. For example, I have love spell from 2 different suppliers #1 I use 1 oz ppo in soap #2 I use 1 oz for 3.5# recomended usage rate 1.9 percent Actually #2 smells stronger.
What are the ingredients? I use cyclo/fco. My cost per gallon of base is around $65( inluding shipping). Definately cheaper to make it yourself, that would be around 45% profit margin.
It can be there for several reasons. For the trace minerals to thicken the product Have you ever felt Dead sea brine? It feels oily and isn't the least bit drying
Grainy butters are usually the result of slow cooling. The use of an ice bath, or a few minutes in the freezer then whip and repeat. The cooling should be as even as possible
Pine tar soap!! I had a few "spots" that itched constantly, no rash or visible signs of why. Since I made the soap and have been using it, no itch! This has also worked for several freinds