I notice that you choose to use both EDTA and Sodium Gluconate. What do you use as deciding factors on which to product to use with a particular batch of soap? I have been away from making soap for close to 8 years and don't recall using either in my soaps, (I don't recall a lot of things!) I never had the dreaded orange spots, but hated the scum the goats' milk soap left. In my new game plan, I will be doing mainly goats milk with a small portion of water and hydrosol batching as well.I personally would rather work with know factors such as EDTA and Sodium Gluconate where I know how much extra lye to use. I use EDTA and Sodium at 0.5% each and have no DOS issues in soaps up to 3 yrs old. I do superfat low, also soap with vinegar adding in the extra lye to react the vinegar which apparently adds some chelating factor also, but I use vinegar to allow my soaps to de-mold quicker. I simply do not like to deal with unknown factors, when I do not have to.