Sorry for not replying sooner, missed your post somehow.
To get rid of wrinkles I use a damp clean cloth and use a steam iron. Place the cloth over the wrinkle and give it a good steam, while applying firm pressure..
My jerseys go in the normal wash, inside out is best. I rarely iron them as they come out fine, but if I do then iron inside out as this protects any screen print details.
Hope this helps.