I've had some infected beer before and a good hot soak in 180 degrees for everything, including rubber gaskets, is all you need ot resantize the kegs. I've boiled poppets in microwave. No need to replace everything IME.Agreed—all the small parts of a keg can be boiled with no ill effects. Near-boiling water sloshed around inside the keg (be careful) works well, too, as has also been suggested. Another approach is to use a couple of different kinds of sanitizer in case you have a resistant bug. I normally use StarSan, but I whip out the Iodophor once a year just as a precaution.