Open the first clip on your prong scissor carrier. Remove the blind from the carrier and carefully place it to one side. Repeat this step with each vertical blind on the carrier.
Remove the broken vane from its hole in the scissor carrier with your right hand, while you hold the front and back of the broken section of the scissor carrier together with your left hand.
Insert your replacement vane through the hole, and press gently until it clicks into place.
Replace the blinds to the scissor carrier and the scissor carrier to the head rail on your window.
Open the first clip on your prong scissor carrier. Remove the blind from the carrier, and carefully place it to one side. Repeat this step with each vertical blind on the carrier.
Locate the broken piece of plastic in the scissor carrier. Apply a thin layer of superglue to each side of the break in the plastic.
Press the two pieces of plastic together, so they form as they did prior to the break. Hold the plastic together for 2 minutes. Allow the glue to dry for 10 minutes.
Replace the blinds to the scissor carrier and the scissor carrier to the head rail on your window.