If you are finding it hard to get started at the beginning of each seam on the sewing machine, place a lightweight machine embroidery tissue underneath the fabric and hold the thread. Remove the paper gently after you're done. To hem side slits and simple necklines, turn the hem allowance to the inside and sew from the right or wrong side. To hem bottom hemlines and simple necklines, the treatment of choice is to use the twin needle from the right side. Blind hemming works well for hemming bottom edges too.
Spandex is heat sensitive, and the fabric easily gets permanent shiny marks on it.
If you absolutely must iron, hold the iron above the fabric, give it a shot of steam and finger press it. Fabrics Lightweight soft fabrics include crepe de chine and charmeuse. Soft transparent fabrics include chiffon and georgette. They are all fragile and elusive. Follow these tips for easier cutting and handling.