Boiling seems like too time consuming to me.
I run them under hot water, clutching them in my hand to the faucet to force water through them. Connection side down so as to not push the filling out. Set the water as hot as you can without hurting your hand and hold them like that for about 30 seconds. That seems to get all the flavor and gunk out.
To dry them, I do a taryn spin -- put them connection up into a pill bottle with some holes, and spin it on a string for a few seconds. Seems to get them dry enough to refill right away. If you're a perfectionist, let them sit overnight to finish drying.