when are they breaking? when do you 'hear' threads breaking? is the seam threads breaking or are quilting threads breaking? are you hanging wet quilts? (the weight of a wet quilt can break the quilting threads) we need a bit more information before we can help you- it could be the thread was weak to start with...do a 'tug-test' on your thread---(take a length from the spool between your two hands & give it a tug- if it breaks easily the thread is too weak to use) I've never *heard* my threads break in a quilt before...what is happening to the quilt at that moment?