I started using the Clover Iron when I began to use washable glue instead of pinning. Rather than waiting 3-5 minutes for the glue to dry, like the directions said on the washable glue, just press the seam with the iron and it quickly drys out the glue. I put the piece between sandwich wax paper so that I didn't get glue on my ironing mat. My 4-patch is perfect every time, no more unsewing.