Share 'Stuffed nose when Cracking and Winnowing'

I have noticed that in days of intense indoor chocolate making work I end up with some discomfort. Commonly a stuffed or a runny nose, similar to having a cold.  My first guess is the smaller particles that are liberated when grinding the beans and winnowing may get into one's respiratory system and produce this symptoms. I tried wearing a mask while grinding and winnowing (both indoors) and it…