I think I change my needle way too often. I bought 100 needles recently plus I have a bunch more of Titanium ones. I change my needles frequently. I just feel good about sewing when I have a new needle in. Everything seems to work so much better. Even if I've only sewn for 3 hours, I'll change the needle. I know this sounds like a waste, but it's my waste and it makes me feel like I doing a better job. The seams look better and it's so much more pleasant.