News to me is that some iPhone and iPad Home buttons become unresponsive. Both Marco and Khoi have had trouble with theirs. Marco tried a software recalibration which didn’t fix anything, but Khoi sprayed his Home button with WD-40 and it did fix it.
Never in a million years would I have thought to spray WD-40 on a gadget. Even after hearing Khoi’s testimony I still don’t know if I could bring myself to do it.