I'm not sure if this is the right spot to post this question as I'm new to the site. My brother really enjoys ceramics and takes ceramic classes at a local community college. He started working on ceramics at home. We don’t have a lot of extra room at our house so he uses the kitchen as his workspace. He stopped working with wet clay and sanding his pieces at home because I was concerned about the clay dust that was being generated. I’m still worried about having open glaze cans, glaze covered paint brushes, unfired glazed ceramic pieces, and glaze stains on the counter of the table I eat at. He uses Amaco and Potter's Choice glazes. He doesn’t do a very good job cleaning up despite my requests. I’m also worried about dust coming from bisque ware or from his clothes that are covered in dried slip from class. I was hoping you would be able to give me some input on if any of these things are hazardous to my health. I would really appreciate your opinion.