I keep a screen protector on my iPhone 5 and wipe off the fingerprints and oil every so often with a little bit of rubbing alcohol. I wipe down the home button too, but I'm wondering if fluid could get inside through the home button. I saw that the home button has a gasket. Does that seal off the plastic surface of the button from the inside? Normally I would take apart a device to have a look to satisfy my curiosity, but I don't have the tools and I kind of need to have a working phone.