Crocheting is the best way to get rid of loops.
Some people use crocheting to tighten roots but it will actually hurt your dreads in the end. Roots that are tightened by crocheting turn into dreads that look like braids and never lock up. They look like braids and never lock up because the hair is twisted so tightly that it can’t form knots, therefore it can’t dread and lock up. The best way to tighten roots is clockwise rubbing.