Wow.

> I often have to make repeated presses on my iphone until it registers.

This makes me really curious.

And you seem to have a problem with all your Apple devices. That’s why I wondered whether you’re experiencing that only with Apple or whether it happens with Android devices as well. Perhaps you could borrow a friend’s, or try using a demo phone at a store etc.

Also have other people use your problematic devices and see if they experience a problem.

I’d love to dig into this further with you (because, curiosity), but alas we live in different universes.

Wishing you a speedy recovery from your cold.

Thank you for the kind words. I haven't had a cold in several years, and this one seems to be a bit persistent. It's annoying, but not a particular problem.

I do have a samsung tablet, and have not had issues with the touch screen.

The swipe up thing on my iphone is particularly irritating in its unreliability.