You need a clear cache button.
Discussion
There is one for this! Go to settings and then appearance and filters, scroll a bit and you’ll see it 
Oh I typed that wrong LOL, I meant to type a working one.
Example, on ipadOS the app is about 20mb at download, it gets to almost 1 gyga that same day, about 900mb, after several clear caches tries it goes down to about 500mb, what the hell is all that data left there? It’s crazy!!