Android phones rarely slow down overnight. Performance usually erodes in small, frustrating steps as apps pile up temporary files, browsers hoard old images, and the system juggles more cached data ...

A sluggish Mac is usually not a sign that the hardware has suddenly given up, but that cached data and other temporary files have quietly piled up in the background. Clearing those caches is one of ...

The iPhone is renowned for its blazing speed, but as fast as an iPhone and iOS 26 may be, there are still situations where your device may begin to act sluggish or feel like it's underperforming.

Follow ZDNET: Add us as a preferred source on Google. As a person who covers consumer tech for a living, I get to use a few dozen smartphones every year. While I almost always advise on which is the ...