IPhone is foggy/discolored after putting screen protector on?

I went to radio shack today to have someone there put on my new screen protector thing that is supposed to be really durable and not break. They used some spray stuff to put it on, and now that i'm using it when i got home it is kind of foggy and discolored all over. Will this go away? The protector was really expensive so i'm not going to take it off and buy a new one

Spit on it then get a paper towel and rub it than put it under water and then spit on it again and put it in rice

Take it back.radio shack sucks really…