The good news is it’s easy to get rid of fake followers. You can weed out the fakes and phonies by looking for:
- 0 followers
- 0 posts
- No profile picture
- High ratio of people they follow to followers
- 0 posts in the last 30 days
- 0 posts in the last 60 days
- Username filled with random numbers
You can just block them then unblock them, and they will be removed from your follower list.
If you have a lot of followers and suspect they are fake you may need to use a third party service to identify and delete them all, but just take it a little at a time.