Hanging Polo Shirts in Closet?

I have a ton of polo shirts and hang them up in my closet on wood hangers. Creases have developed on some of them and I know it's mostly from the wash/dry but I did some searching to see if the way I was hanging them was contributing...they get pretty pushed together most of the time. I was already keeping the collar up while wash/dry and keeping them buttoned all way up while wash/dry and while hanging, the other thing they said was to pop the collar while they're hanging? I haven't tried it yet, but it seems like that's going to bend the collar even more? Thoughts?