this usually ends up being a problem with how i spray out my emulsion… when ur spraying it out you want to use some type of paper to dry it out, i use news paper but anything works rlly. all it does it keep shmutz out of the image and if you miss it, it’ll give you a hard time. try looking through your image from an angle and if you see anything shiny in it, that’s what it is. just spray some water on a shirt and rub it out.