I found that my needle was not 100% straight in its position, my LA friend came over checked the needle, and yes it was out ever so slightly, she also adjusted the height of my machine, making sure I could get my finders under the area, and we changed the thread, some of my thread is really linty, also the vibration from your LA can affect a variety of things. I just had mine into have it checked and it was out of time. I am finally getting used to mine, but has been a long process.