How to get rid of smell

Nothing to do with washing brushes all plaster when drying smells I'm oblivious to it now I've been plastering for over 40 yrs . Just get the windows open when you can in this weather when plasterer is dry no smell

The best way to answer your question. Is the chemicals that are used in Plaster for setting the Plaster, when reacting with the water, can sometimes smell like egg or a little bit off it’s perfectly normal, nothing to worry about once Plaster is dry. The smell will disappear.