I also use any variety of quilting thread as NJ Quilter stated but I don't use any conditioner on my quilting thread. A lot of it is glazed so not sure the conditioner does anything. Just one less step. I was told to look for glazed thread to hand quilt with but I have used machine quilting thread too, just because it was the right color and I already had it. I also use a larger needle, #9 I think. Easier for my short, fat fingers to handle.