Removing Mud Stains from Dried Clothing?

I went mudding and my hoodie obviously got covered. We were in a hurry when we did the laundry and forgot to treat it. So we washed it and then dried it. Then I saw the mud stains. I am using rubbing alcohol along with shampoo mixed with water and it is slowly getting it out as I scrub, but it is taking forever! It's a neon yellow hoodie like Penndot color. Please help.