Hi! I have been making cold process soap for a couple years now, I always use the same recipe, and this has never happened. When I first pulled it out of the mold, it looked perfect on the sides and bottom where it was touching the silicone mold. The top looked okay too, except I noticed a few brown specs. However, the white and purple looked great. Upon cutting it, I noticed the white swirl on the inside had brown spots as well, and was more yellow than white. I cut a few pieces, and after a couple of days the outside has started to turn yellow with spots as well. What could be causing this? And is there any way to remedy it? Thanks for any help! Also- I typically put the soap mold uncovered in a dark oven. This time I put it in the dark oven and my boyfriend put the wooden lid on it as well. could this have anything to do with it?