Your powder wasn't dry enough. When the powder isn't dry, your final solution will be cloudy. I've made it a few times, and always dried the powder for at least 4 days. This time I only dried it for 2 days, and thought it was dry enough, my solution was cloudy. I popped open the sterile viles, and put the solution back into the brown vial, and then nuked it for a few 30-20 second bakes, spaced out over the course of an hour. This got rid of all the water, I then refiltered it into two new sterile vials. It sucks, but if you want it to be clear, thats what you have to do. Although you can use the solution with water in it, it shouldn't be a problem. I just did it for peace of mind. Good luck, and enjoy your experiment.