Urg I need to improve the caching system. Currently the app just dumps all of the stuff it downloads into a folder and loosely organizes and manages it. If you browse a lot this can grow pretty big. The data does get cleaned out sometimes but it seems like it's not aggressive enough.

In the new release which should drop today, I've both increased the strictness of the cache so the cache size should be smaller and also added a very minimal cache viewer in settings. This should at least give you a little insight into what is going on. In the future I will add more info to the cache screen.