Thanks so much for the ideas, Prism99 and Mytwopals!
Prism99, I think you described it just right - the top thread isn't pulling hard enough on the bobbin stitches! - at least that's what it looks like to me.
I had already cleaned the bobbin area of lint, etc. I didn't know about the floss idea, and only had waxed, used that, and didn't see any lint in there. And I just put in another new needle, just in case. :wink:
After changing the upper tension to 5, 6, I'm at 7.5 now, and it seems to look better, but not a whole lot. It seems if I go higher, the bobbin stitches get sloppier. ?
While trying the bobbin tension test (when I could keep the bobbin in! lol!!) it doesn't seem to drop at all.
Before I mess with it, could that be causing the problem, or is it most likely still in the upper tension, or my going too fast? My top stitching looks fine. I think I'm going to the same speed as usual.
Thanks so much for your help!!!
:D