Connor loves this shirt. I don't. Neon yellow/green, it just is not my color.
Anyway, he put one of those big square stickers on his shirt, the kind you get at the bank. I didn't check his clothes carefully enough before tossing it into the washing machine. And then into the dryer. So the sticker left an awful residue.
First, soak the area with Goo Gone. You will want to put a towel or something in between the layers of fabric, to avoid getting the Goo Gone all over the shirt. The stuff stinks, and can leave an oil mark. Allow the Goo Gone to soak for about five minutes. Then gentle brush it away with the toothbrush. When I did this, all the glue residue came right off.
I wanted to avoid an oil mark, so I sprayed it down with some Tide brand spray-n-wash, and laundered it up right away.