Great points Glenn!
Some additional thoughts on sanitizers. The reason I asked about which sanitizer you use is that sometimes when bleach is used as a sanitizer and not completely rinsed off it will impart a somewhat "plastic" or "band-aid" smell. This is apart from the Pediococcus sp. effects on mead, beer and other fermented beverages. Glenn is right on about having an endemic infection in your meadmaking area. It's a bitch to get rid of it as was the case with one of the guys in my brew-club. We finally ended up just pulling everything out of his garage and bleach cleaning the floors, walls, ceiling, fixtures and everyting that was bolted down. All the brewing equipment that wasn't stainless or glass was pitched and replaced. Voila! No more infections.
In my former life I was a Medical Technologist/Microbiologist and one of the many things I carried over from that discipline into fermentation is that I change up on the sanitizers I use about every 5th batch (generally Iodophor and Star San). This helps to knock off anything that is building up a resistance to the current rotation of sanitizer being used, and also is a good way to keep on top of your aseptic technique. It's always advisable (in my opionion) to use a small kitchen torch to flame the mouth of your carboys or corneys before and after each treatment, specific gravity sample, pH testing, etc. Be sure that you clean around the mouth of the carboy, down the neck and of course your airlock and bung as well.
Keep dust, pet dander, dryer vents, ventilation registers etc. clean and free of dust and debris. It helps to mop the floors at least once a month as well with a bleach solution.