If you are going to get another foot, return the foot you have and get your money back. It apparently is defective, I think. Your needle shouldn't be so close to it that it hit it. And you shouldn't have to sand it, even though that is a very good idea that you could do. But don't just keep it and not use it. Feet cost money. At least get your money back to help pay for another foot. I don't quilt so I can't give any advice, but I don't want to see you waste your money.