Reading the recent Teflon and PBW thread got me thinking. I am meticulous about cleaning my kettle, immersion chiller, pump and lines, and fermenter. But, when it comes to my cooler style mash tun, I just rinse it out, dry it and store it. I guess I feel that everything that comes out of it gets boiled anyway so I'm not that meticulous about cleaning the cooler or soaking it with cleanser. Am I making a big mistake here that I'm not thinking about?