Long haul flights [misc]

Hey all, I have a long haul flight next month. About 20 hours. I’m sure I’m not the only one who gets of a flight feelings dusty and crusty from the air con. I plan to drink water to remain hydrated but I’m wondering what tips or tricks any of you might have/ use so I can step off that flight glowing. I’m pretty much going straight into an important meeting so I really want to look my best. I really appreciate any guidance or advice you all have 😁