If you dont know how to sew, you may have to change until you can get your pants fixed. But if youve had No Stitch, the product claims you could fix your hem on the spot-- no needle and thread required. Put the wax paper over the fabric and use the heat wand pressing it for 30 seconds over each section of the fabric you are fixing. Test: Litchie tested No Stitch by using it to take up a pair of her blue jeans and to fix the hem on another pair of pants. She threw the jeans in the washer and then dried them to make sure No Stitch would hold.