After curing, peel the transfer paper once it has cooled down, and then cure again without the transfer sheet (unless necessary). This also helps improve washing fastness of the print. For final curing, it is advisable that heat press machine is used instead of flat iron for even or balance curing.
All transfer prints have a tendency to wash-off after some washings. It is recommended that during laundry, the substrate is washed inside-out to make the print last longer.