Originally Posted by
Genden
edit. Just realized you are using Aerofil thread and I didn't know there was such a brand. My search doesn't show that it comes in hand quilting thread, just quilting thread, but I may have missed it. I don't know the quality of this thread. It sounds suspect for hand quilting.
Aerofil is made by Madeira (not to be confused with AURIFIL, lol). I've always found it quite a thin thread and have never thought of it as a quilting thread. Have you changed your batting?