We have tried: We used a finer needle (size 70) to sew the parts. Before sewing, it is advisable to slightly reduce the upper thread tension and sew at a medium to low speed so that the thread does not twist and the stitch is nice and regular. Before sewing the parts, we recommend that you test it on the rest of the material and adjust the thread tension or stitch length as needed. Transparent thread is not suitable for ironing at high temperatures! We used a lower iron temperature when ironing.