I use Griffin natural silk, a brand new pack of nr. 3 in this case. I pre-stretch it by hand (and I’m not that strong, so it shouldn’t be an issue), and knot by hand too, without pliers or needles or anything that could damage the thread. The pearls are very old and lasted a long time on the old string, so I doubt they’re that sharp. I’ve never had this problem with Griffin’s high performance or nylon power, but natural silk is supposed to be strong too, so I don’t know what’s going wrong. I’ve tried 3 times and it keeps breaking while knotting.

Does anyone have any advice?