I have two cut strands of string lights that I want to reconnect, but it's proving very difficult. They have a plastic/rubber coating around the wires which makes them stronger and more durable, but I need to strip it back to solder them together. Since the wires themselves are thin, they are particularly weak at the connection point where I solder them and they snap apart easily. Are there any tricks or trips to strengthen the wires where I solder them together?
Use heat shrink tubing to provide a strain relief to your solder connection. Be sure to use the correct solder (electrical, not plumbing) and clean the joint with isopropyl alcohol prior to heat shrinking.