LOL - my worst? My test came back with bacteria and mold! I had infused some oils with White Willow Bark and the preservative could not hold it! I have since learned (today actually) that if you are infusing oils with herbs you are creating an environment for botulism :shock:
Needless to say, I wasted my money. The lotion had mold on it after one week. I ended up buying a book to see what I needed to put in lotion. I havent made any with preservatives yet.