I wish I'd seen this thread when ash was much littler! Ash has always nipped - main,year me. Wegot him at 7.5weekks, i suspect he could have done with another week with his mum and litter. We asked advice of lots of people, loud yelps did Not work, finally ignoring started to, but by then it had become a habit. Then ash got ill and started nipping in pain or fear. Again, habit made. Now at 13 months we're having to work really hard against it- it's working - it seems the line that makes him nip has moved further along, but its still there. I get bruises on The back of my arms.
I've done endless research but find nearly all information is on prevention by stopping it early, not what to do when it's,become a habit.
We find ignoring works, deflecting into a command, and giving ash a toy stick to carry which occupies his mouth.however he recognises places he should have his toy now, and when he doesn't have it that's sometimes enough to make him jump and nip!
We're definitely going in the right direction, it happens much much less now,but any further advice is always appreciated