I have been blending different essential oils to create scents. I tried the toothpicks in plastic bags, but they all smell the same. I had at least 18 bags with a different blend in each. Could the plastic be melting? I just ordered a dozen glass pipette droppers. Once I receive them I am going to try blends with drops in small glass vials (from contact lenses). I hope this will give me a better idea of the scent. Any other suggestions on blending?