When does hexes go away? I'm new so I didn't know there were such things... It's cool but annoying too

This should probably be in the Help & Questions forum. :) But to answer your question, hexes usually only last a few hours before they disappear.

Moved this to the proper forum for you. And just for a future reference, you might want to put part of your question in the topic title so people are more likely to check it.

you can buy a hex remover from the crystal shop If you use it it will take a few minutes for the cache to catch up so don't freak out if it doesn't appear to work right away.