I got the Vanilla Rose color as a free gift in a magazine, but couldn't choose a color. It's easy to use and useful for both work and personal use, but the first time I used it, I noticed some black, dust-like specks in it. What are these? ? It seems to come out no matter how many times I use it... Is it something that's hardened? Does it turn black when it discolors? (By the way, I don't put it in a black pouch or pocket.) It's okay because it was a free gift, but I'd be too scared to buy the actual product.