This is probably so simple it's obvious, but I haven't seen it addressed before. What do you do with the ends of the threads used to gather/draw up the pleats? I have two nearly-finished cartridge pleated skirts hanging in my bedroom, with long tails of threads dangling off the sides of the waistband....
Gramercy!
I rethread mine back onto a needle, and knot it into the fabric, then cut off the extra. :)
I usually string a bead or two on the end, knot it and cut off the excess.