Flakey skin on face?

[colleeflowers]

My silkie, Aster, goes broody often. I notice she gets this white buildup around her face and her eyes get puffy and irritated if she stays in the coop too long. Any thoughts on what it is and how to treat? I do treat for mites 2xs year. Should I try vetrx?

 

[PippinTheChicken]

Have you seen mites in your coop?