I’ve been making soap for years and my recipe includes olive olive, coconut oil and Shea butter. Lately the results have been disappointing in that the soap is very oily, and lacks hardness. I’ve noticed the lye does not dissolve fully in the water. Bit I’m also wondering if the Shea is responsible- same supplier, but it is noticeably softer. I buy the lye from Robert Dyas. Anyone noticed something similar?