If you don't see an option to "Clear All Application Caches," it may be because your Fire TV is on an older software update.

You can clear app caches to make more room on your Fire Stick. Deleting apps you don't use can help free up storage space on the Fire Stick. If needed, reset the Fire Stick to fix storage issues and ...

Clearing your TV's cache can boost performance - here's how to do it on popular brands like Samsung, LG, and more.