Just pushed a NostrGram update that allows you to broadcast any note to all your write relays. If you see a note that you want to make sure it's written to your relays to get good coverage (or if you were having trouble with one or more of your relays and want to "repost" your own note(s) to them to make sure it's there) click the ellipsis (...) in the note actions and choose "Broadcast".