... Make sure you use high quality 100% polyester thread (I use Gutterman, based on other's recommendation). I hear that "Dual Duty" these days is made from polyester only (and no cotton, as in the older dual duty threads).
I'm using a all purpose/machine sewing thread in natural (no dyes).

I did find out (after my previous post) that the bobbin was messed up so now that's fixed, all should be ready for tomorrows sewing.