I've long had "sensitive earlobes."
What this really means is that I can't wear any earrings for very long. Or my ears get infected and itchy and painful.
I received a pair of earrings for my past birthday that I LURV but could usually only bear to wear them for half the day before my holes hurt so much I had to take them out. And then my ears would be infected for a few days so I wouldn't be able to wear any earrings at all.
So - I recently found a way to deal with this problem: Every morning before I put (any of my) earrings into my ears, I stick the post into a tube of Neosporin to help kill all the bacteria on them/in my holes/around my holes/that develop during the day and then put the Neosporin-covered post straight into my ear (don't wipe it off or anything).
I have a specific Neosporin that is only for earring lubrication so I don't worry about it infecting my cuts or whatever else I use Neosporin for. If you have just one Neosporin then I would suggest squeezing it out onto a cotton swab (aka Q-tip) first and then using the swab to put the goo on your earring posts.
I haven't tried it myself but I imagine that anti-bacterial hand gel might work in this capacity as well.
(P.S. I also put Neosporin on pimples that accidentally pop (too early) when I'm washing my face a little too hard or in the shower - it cuts the healing time down drastically and doesn't leave a huge angry red (or white) mark).