I would wash or soak gently and see how each tie reacts and use only those that played nice in the water, no shrinking or bleeding or fraying or wrinkling.
peace
EDIT: I mant to add that washing them first may save a step in prepping them. If they don't come out of the wash okay, don't bother to take them apart.
Last edited by ube quilting; 12-30-2014 at 07:23 PM.