Some of my needle tips feel like they have a scratch on the tips. This bothers my finger tip when I'm pushing the tip after making the stitch.
Is there a way to fix this? It's on my Addi turbos that i use all the time. If I drag a fingernail over the tip, I can feel a 'catch' or scratchy piece.
Please Help!

(Cannot return them as I dont' have a receipt or original packaging)