I sanitize my mash tun, my BIAB set up gets a starsan treatment, my utensils, my thermocouple, my chiller sits in starsan until about 10mins before end of boil. That's the only sanitizer I use on it before it gets put up. I don't use iodophors or peroxidic acid on my mash tun stuff or my utensils because they don't really need it because they are only used preboil and utensils during boil.