Screen Printing Degreasing Screen-printing?

Screen-printing? - screen printing degreasing

My friend and I bought the pants a few weeks ago with letters printed on the screen (I think that's what the woman called ... I'm not sure, ob) in the ass, and one of the letters is still in its infancy.
Is there anyway to make, to sit down again by you, or what? And when I iron, I have everything to the letter before you put it? When we take off your pants plastic letters, real letters, like models or something.