Does anyone make their own yogurt? I've been thinking about this for a while, and it sounds a bit like homebrewing except using milk instead of sugary liquid! A shop near us sells "yogurt makers", but they seem to be just a kind of thermos flask that keeps the yogurt warm, could I use a regular thermos or would it cause terrible smells? I'd like to keep it as simple as possible, any info or advice would be much apprieciated :)