I have a gold Touch n Sew, model 603, that has been causing me a lot of headache! I'm fairly new to sewing so I am not doing very complicated things, usually just straight stitching on simple shapes and patterns. If I'm not using cotton, then it won't sew right! I use knits a lot and its a nightmare. It won't catch the bobbin thread all the time and it leaves irregular stitches or none at all. I've used the material for my projects on two other machines (70's singer and elna lotus) with no problem! I always thought I was bad at sewing, but now I'm starting to think there is something wrong with my T&S!

The bobbin area is pretty clean. I always use a scrap piece to try different settings and nothing really works. I've completely cleaned the machine per the manual as well as re-threading the bobbin millions of times. It's been completely serviced a few months ago and was told it works well. I don't want to just give this machine up since it was my grandmothers.

Any suggestions before I take it back to the repairman?