Don't use the sleeve you are wearing. It's super fragile, any little heat will melt it. Probably your body heat melt it. And don't breath while taking the shot, your breathing will melt it too. It helps when the temperature is super cold. This one is not super cold, why you see the water droplets. Anyway, I take it as a challenge. I'll keep improving my method till I can take a great shot of a perfect snowflake.