I've dropped cell phones (twice..maybe 3 times?), keys, wallet (very bad), Sunglasses, guards from hair trimmers, and probably more stuff than I remember. Almost all of these occasions involved me being shmammered.
.5% bleach solution is my ally. You just have to watch out for what and how long you leave the items in bleach for obvious reasons. It probably doesn't need to be more than a couple of minutes, but if you dropped them in a toilet full of bombs or at Dorcherster, maybe a day of soaking would give you peace of mind...