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 ...

Lag on a Roku TV rarely arrives out of nowhere. It usually builds up as temporary files pile on, apps misbehave, and the system’s limited memory gets squeezed until every menu tap feels sticky.

Clearing your TV's cache can greatly decrease stuttering and improve performance. Here's how to do it on brands like Samsung, LG, and more.