You just noticed a crack right over your phone’s under display camera. Your selfies look foggy. Video calls show strange light streaks. And you are worried the damage will spread. You are not alone. Thousands of smartphone users deal with this exact problem every year, especially on devices like the Samsung Galaxy Z Fold series,…

You just turned the page on your e ink tablet, and there it is. A faint shadow of the last screen is still visible, like an afterimage that refuses to leave. Text from the previous page bleeds through. A menu bar outline stays frozen in place. You might even see a dim version of a…