Hi, i recently bought a new nikeFIT light hat. The blue and grey one, with the black Nike logo. It shows the sweat line pretty easily, so i went to wash it and i just put it in a tub of water with soap. I did not scrub it or anything, i just let it soak. I put it outside to dry. When it was dry, you could see that the bill of the hat where my sweat line was is a different color than the other half. It also has a sweat line. What did i do wrong? When i wash it, should i scrub it or squeeze the excess water out? I thought letting it soak would do the job.