Last year a bird pooped on the bill or my hat. I didn’t know what to do and I ended up getting sidetracked and went out of town shortly after and then forgot about it.

Fast forward to now: I just found it again and I don’t know what to do

How can I clean it off? The bill of the hat is orange. Will peroxide strip the color if I put that on the spot? The underside of the bill has a reflective material (not sure if plastic) on it so I was worried about washing it with water or soap.