I really love Dead Sea mud in cp soap and I'm very happy with how this soap turned out but the weird green colouration on the top is a mystery. It happened once before using D S mud and I was able to wash it off with some scrubbing, but I wonder what is causing it. Could it be the alcohol I spray on the top to prevent ash? The recipe is my usual lard, co, oo, castor oil one. Added kaolin clay, sodium lactate and silk peptide as I do in most soaps. This happened the 2 out of 3 times I have used this mud. Same process. Basically same ingredients. All gelled. Any thoughts?