[Misc] Oily pillow case but skin and hair don't look oily. Help!

Beauty Tips For Body Care
I apologize in advance for my format (I'm on mobile). I need help! My husband wakes up every morning with an oily pillowcase. I mean, you can see area where his head rests and it's so much darker than the rest of the pillow case. I have to wash them almost daily to try and keep them looking nice, but I'm hoping this wonderful community can help us resolve this once and for all. He's tried taking morning showers, midday showers, and evening ones and it's still bad. His skin and hair don't look oily at all, so that just baffles me! He's not thorough with his skin care routine, but this is what he does every day: shampoo with suave professionals, and antibacterial dial for his face and body. That's it. I know it's terrible, but he HATES a big routine. However, he is willing to try suggestions from you all to see if it helps. Thanks, everyone!
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Submitted by coffeeandcats1011