I bought some old fashioned mothballs that are made from this white ball that you can crush into powder because the place I just moved into is infested with cockroaches. I am looking for a new place to stay, but for now I need to protect my computer. Will these mothballs be safe to stay inside of my tower? I know a lot of people recommend it for roach problems, but I want to know if there are any side effects from having them in there.