My foster son has a duel lumen central line that is used for TPN and other meds. I was first told, to use alcohol wipes, to clean the caps with. In one of our trips to the hospital, I was told that only betadine should be used to clean the caps. We were just at U of M Hospital a couple days ago, and I was told that betadine is good for the skin with dressing changes, but alcohol works better to clean trhe caps. Which is right?