I am getting ready to start my own sourdough starter but not quite sure what's the best way to keep things clean. Some people say they using dish soap is ok, some say they never use any soap, just hot water to clean jars and utensils. Also, should I clean the container that I use for feeding the starter every day? There is usually some residue on the walls of the container. I would think that at warm temperatures that residue will harbor harmful bacteria. Your advice will be very appreciated. Thank you!