I just started using EDTA in my soap batter. I add 5 g dissolved in a little warm distilled water to a 40 oz. oil weight. I use a silicone loaf mold. I have made 4 batches in this manner, all with formulas I have been using successfully for a long time. I am getting some brittleness in the finished soap log. Could this be from the addition of EDTA? That is the only variable that I believe to be different. And I know I am not waiting too long to cut the loaf because the interior is sometimes a little too soft and drags on the blade. I stop and wait a day or two longer.