What’s the best way to shorten or splice a nylon draw cord (e.g. from window blinds)?

Solar Powered asked:


We needed to shorten the draw cords from our window shades (honeycomb blinds from 3 Day Blinds). Fusing the two ends back together is more difficult than you might expect.

We have been successful at heating/melting the cut ends with a lighter and squishing them together, but this tends to both discolor the cord and to leave a hard, rigid spot in the cord that hangs up when it goes through the rollers. In other words, it works, but it’s not ideal.

A visual inspection of the factory splice suggests that they’re joining the ends without heat. Is there a special tool that does this? or a different technique that yields better results than what we’ve done?

Ashley