you could always ask your jeweller to rhodium plate some of the posts of your earrings,its part of the platinum family and very pure,if it works you can always get your jeweller to replace posts and hooks with platinum which in itself is also extremely pure,also you could try bathing your ears with surgical spirits (alcohol in the US?) stings like a *****! But it really does help to kill off any lingering germs and bugs that thrive in hole caused by your earrings!! Also, once you have managed to pour (a tiny bit!) through the hole twist the earring very gently in the hole to reach any lurkers!! and try not to fiddle with them after that as even after washing your hands your fingers can still carry germs that your poor ears will be so sensitive to!!!!Sorry for sounding so obvious but some times when you get so pissed off with a situation,you can overlook something as simple and easy as that,lots of love to your poor ears!!!!