Fixing a loose lace is an important task that can be done by retieing it. Retieing is the process of taking the two ends of the lace and tying them together in a knot. This will ensure that the lace stays secure and does not come undone. It is important to make sure that the knot is tight enough so that it does not come undone easily. Additionally, it is important to make sure that the knot is not too tight as this can cause discomfort or even damage the lace.