I tumble and separate my brass in the back yard with a mask and always wash when done, but I'm paranoid about tracking it in the house, as I have a one year old boy. I'm a bit OCD, so I worry that these precautions aren't enough. Could any dust getting on my clothes and tracked in the house be enough to cause health problems? Am I worrying too much? It would kill me if I did something to make my boy sick.