You know how it is. It’s the day before your big performance, and you find a little run in your last pair of good tights! You don’t have time to go out and buy more tights, so you can’t afford for the run to get any bigger before your performance. So how do you keep the run from getting bigger? Clear nail polish. Put the tights on (carefully, so you don’t make the run bigger). Dab clear nail polish on either end of the run, let dry. Remove tights. Wash if needed. Putting the tights on and leaving them on while the nail polish dries ensures that the tights are as stretched out as they will be when you are dancing in them, rather than drying unstretched and then tearing or making weird wrinkles when you put them on and dance in them.