Put the embroideredd side down on a folded terry cloth towel. Lightly spray starch on the back side and press the backside with an iron on an appropriate setting for the fabric/thread. I use a medium heat. Press the back side until it is dry. I use a circlular motion while pressing. If you just press the iron straight down on the embroidery, you can get wrinkles. You can use a wool pressing mat, but a towel is handier for me and I can throw it in the wash when needed,