I rotate between two chains every 6 months (about 1000 mi), and the off-duty chain gets shaken 'clean'-ish in some simple green, rinsed and dried in the oven, before getting coiled flat into a ziploc bag with a couple Tbsp of Chain-L. I flip it to let the Chain-L trickle through to the other side when I notice it in the garage cupboard. If the chain makes noise between swaps, I add some Chain-L and wipe down. If I happen to get my face close enough to the chain to notice gunk on it, I'll wipe it with a paper towel. (I need to do this)