Roku doesn't have a settings option to clear the device cache. Here's how to clear the Roku cache anyway.

Too much cached data can slow down your Roku, causing sluggish app loading. A quick system reset can clear this up and restore smooth performance.

Select "Clear Cache" For Roku TVs: Roku TVs don't have a built-in cache-clearing option, but you can achieve similar results by restarting the TV or removing and reinstalling problematic apps.

If your smart TV is slow or acting up, clearing the cache might help. However, it won't magically make your smart TV fast.