How do I clean my black vans authentics?

A bird pooped on them and i cleaned them with water and a brush and mild soap but the stain is still there! It is not faded because I cleaned the whole front part of the shoe like that and only the part where the poop landed is stil whitish looking. please help!

How do I clean my black vans authentics?
i would buy some suede cleaner and spray it on there, wait a little bit and then wipe it off. thats what i use on all my vans and on my jordans




buying