[insurgentx]

Hello,
Sometimes after pressing a printed film on a shirt, the whites looked like as if they are cracked, there are small spots where the white is thicker than the other.
These spots are mostly gone after peeling then pressing the shirt again.
So far I have done the following:

• Adjusting white ink density
• Adjusting curing temp
• Adjusting curing time
• Adjusting heat press temp
• Adjusting pressure

Still, the problem keeps coming back every now and then. So far nobody has noticed and pointed out about these white spots since they're tiny. Doesn't affect durability as far as I know.
But it has always been bugging me everyday.

Any idea of what might be the cause of this?
Thanks in advance.