Do you use Glide thread?
An online store I love had a super sale on Glide thread so I bought a bunch. I have no idea what I was thinking as I'd not previously tried it and have been a Gutermann cotton user forever. I have my first spool of Glide on my machine and it doesn't seem to work too well for piecing. I find I need to cut tails longer and the edge stitches want to loosen or pull out. Is Glide not meant for piecing? If you love it, tell me why. Please!