I had the IV tape, but it's not very big, so I found myself needing to use two of them at once, and then I had to hope I didn't get them stuck to each other instead of my skin -- that was what inspired the thought of the tegaderm.
My CDE said I can run the same sensor site through two three-day cycles, telling the pump it's just a brand new sensor after day 3. However, I haven't lasted that long through a second cycle without the spot getting itchy. Which is weird, because I always run my infusion site for the pump for the full 4.5 days that the reservoir lasts. So I'm not supposed to do THAT more than 3 days, but it's hardly ever an issue.....but the one where they say it's okay to, I can't endure it!
And I don't use the IV prep. Wipes like that (or alcohol wipes, when I was using needles) just seem more of a waste of money than the perceived benefit.