I use Aurifil thread exclusively for quilts I make for family and friends, and I have NEVER had any problem with it (I buy 50 wt.). I just love the thread, so I think you surely must have purchased a defective spool. Connecting Threads Essential is nice, and I use this thread for my charity quilts, as the cost is more manageable than that of Aurifil thread. I strongly suggest you return the Aurifil thread and ask that it be replaced. It is such a lovely thread, I just know you will love it!