Imidazolidinyl urea, quaternium 15. Methylisothiazolinone (MI) -- do you know what these products are?  You are likely smearing them on your face every day when you put on your makeup and again when you are removing it at night.  These chemicals are preservatives or formaldehyde-releasing agents meant to keep bacteria out of your makeup, but they are known skin irritants and common culprits...