So the soap i did today is still soft, I also started adding 5% castor oil at the same time could that be the culprit? the recipe was 15.2 water, 6.4 lye, 2.3 castor, 11.5 co, 13.8 oo, 13.8 palm, 4.6 shea. Any help would be really appreciated. This hasn't happened with the other batches.