Well, the incubator is in use currently. I'll have to get the chicks out of it and sterilize the crap out of it (literally) before I'd trust it with yogurt, even in a sterile bowl.I have a yogurt maker. You need to add the plain yogurt or starter between 110-115F (ideally is 112F). The temperature for the incubation of the yogurt bacteria is in that range. At 120F you will kill it, at 90F is inactive. Good luck with your experiment.