Originally Posted by Bluelady
I no longer use coats and clark thread due to a similar problem. I try to use Gutterman, aurifil or superior thread. Although I have a lot of metzler thread I am using for piecing too. But as it is used up, I will switch to superior or aurifil.
I also only use 100 percent cotton for my piecing.
The thread this was pieced with was 100% cotton Aurifil...so I don't think it's the thread...if it was the thread it would show up in more placed than just in the same area in the blocks where it keeps showing up at.