How do I clear the cache?

How do I clear the cache on the Hipad Plus? I found that I could clear the cache on an individual app. But isn’t there a way to clear the cache on everything at one time?

Thanks.

Sure hope someone can answer how to clear the cache all at one time on the Hipad Plus.

So far I just have cleared a few individual caches. There must be an easier way to clear the caches.