I have made several batches of wine from kits and a few batches of mead. One of the things that must be done after primary fermentation is to test the specific gravity. The wine kits I have used typically have a set of instructions like this: test the SG every day starting on day X until the SG reaches Y.
The way I have been doing this is to make a gallon batch of Iodophor solution, sanitize my wine thief and hydrometer, steal some wine/mead, place the hydrometer into the wine thief, get a reading, and put all the wine/mead back into the fermentation vessel. I realize that I can keep the Iodophor solution around for a few days (or until the color dissipates), but it still seem unnecessary when the amount of alcohol in wine/mead is going to be at least 10%.
I watched a documentary (I can't find a link to it now) several years ago about a winery and remember seeing this guy take a wine thief off a table and stick it into a barrel of wine. Now perhaps the scene simply didn't include the gentlemen sanitizing his wine thief, but it does beg the question: do I really need to sanitize my wine thief after primary fermentation is basically complete?