Michelle,
I also use the Gamsol to clean my brush(es) all day. I used to cover it in between cleaning of brushes but I realized that I had the paper towel in my hand. Every towel with the smallest smidge of Gamsol would have to go in the covered metal trash can if I determined the Gamsol to be so toxic as to have to cover it up.
Now, girlfiend, where does that leave us? I am using the Gamsol unless someone will be so kind as to help me by giving me a health reason not to.
PS: My studio has a woodstove for heating and I have this fear of a big boom someday.
