For some reason my shirt has been ruined by the following shiny patch on my cuff. Same can be seen on shirt back. First I do not understand why it happen and how to fix it?
I have found that if I wash a shirt again, the shininess goes away. Then, when I iron, I turn the shirt inside out. That is, I iron the side of the shirt that would be touching my skin if I was wearing it. Then, if there is any shininess, it will only be on that side of the shirt that nobody can see. The side that everybody sees looks normal.