Like every household fixture, window blinds may wear out with time. The wires, in particular, are prone to damage from being subjected to regular stress when the blinds are raised, lowered, opened and shut. As opposed to buying completely new blinds when a string overlooks, look at buying new string and rethreading your old blinds rather.

Eliminate the blinds in the wall. Some blinds are held up by a bracket and holster system, which means it’s possible to slip the blind header away without having to remove any hardware. Other blinds have to be unscrewed from the wall.

Expand the blinds to full span and lay them out on a large, flat surface.

Untie the knot in the bottom end of the affected cord. Based on the type of blinds, you may need to pry open a small plastic plug in the bottom of the cord to reveal the knot. In case you have trouble untying the knot, cut the cord with scissors.

Pull the old cord out through the holes in the slats of the blind. Pay close attention to the way the string is threaded through the slats — you will have to replicate this pattern when inserting the new string. Repeat steps 2 and 3 if you are removing numerous wires from the same blind.

Put the old cord out to full length on a level surface and cut your new cord to this same length.

Expand the brand new cord through the slats following the same pattern taken from the old cord. If your blind string only runs in 1 direction, begin at the peak of the blinds and work toward the bottom. If the cord runs both up and down, begin at the bottom, work to the top, then work back down.

Tie the cord off in a knot and tuck the cord back into the cap, if required. When you are finished, remount your blinds on the window.