My mom picked up a Salton Automatic Yogurt Maker, model GM-5, at Salvation Army ($3). It has no instructions with it. Do any of you have one of these, or a similar one? She has no idea of what to do w/ it. She's not sure if she's supposed to heat the milk first, and add cultures, and then pour it into the maker, and leave it for 8-10 hrs? Or if she just pours the milk in (cold?) and adds the cultures at some point. Does she leave the machine plugged in and on during the whole thing? I tried googling for instructions and couldn't find any. Any help w/ this would be greatly appreciated! Thanks!