For Amethyst users experiencing bad performance, notifications not appearing, long load times, or a multi-gigabyte cache that keeps growing and won't disappear even when deleting it:

I've had all these issues for like a month or 2 and tried everything, but simply reinstalling was the only fix for me, which I just did.

Before you uninstall, make sure you go to the menu "backup keys", copy your nsec and store it somewhere safely (not in some cloud service or something)

I did it manually and wrote down 2 copies in a notebook, the first one turned out to be wrong so be careful with that as well 😄

After reinstalling, just input your nsec and your nostr experience is back to smoothness.

Hope this helps someone out there.