Just make sure that you are double knotting each string, if you only knot it once it will curl.
If it still curls even if you are knotting twice, you must be pulling each knot WAY too tightly.
I hope I helped(:
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It really works by: Anonymous
Double knotting it really does help. I made my first one and it curled soo much but the next two I tried knotting it twice and it helped bunches. (: Thanks
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How to Keep Bracelets From Curling by: Anonymous
Knot each of the knots two times. Trust me, this really works. Hope this helps!