To Shampoo or Not Shampoo?

This is the time of year when I always get itchy to cut my hair: It was April 2001 when I cut off a foot of hair to go short for the first time in my life, then April 2006 when I went pixie for the first time. (My current long hair is actually an accident--when I lost my job in 2008 I decided to remove haircuts from my budget, and two years of updos later I realized I was a bona fide longhair again. But I digress.)

This time around, the question isn't: Should I cut my hair? It's: Should I wash it?

Erm, to clarify, this is meant to illustrate "bedhead." But you can also see how clean/not clean it looks.

I've been evangelical about the no-shampoo thing (for those new to my experiment: I haven't shampooed since September, just rinsing and conditioning my hair once a week and using a hair powder in between), and while I've tried to be honest about the drawbacks, part of evangelism is sort of glossing over the downside. So, to be clear:

1) My hair is incredibly healthy. No split ends, thick, strong, resilient.
2) I have more time in the mornings.
3) I have more volume, and a fetching bedhead look. (Amiright amiright?)
4) My hair holds styling easier (I am still a big fan of the updos)
5) The longer I go, the more normal it looks.
6) Cred.

1) Let's be real: It can get greasy.
2) As shampoo-free Alexandra Spunt writes in No More Dirty Looks: "It's not that it stank.... But it smelled like hair, and I wanted it to smell like girl hair."
3) When I'm self-conscious, it goes onto the list of Things People Might Be Looking At, right below my extraordinarily sharp incisors but before my worry lines.
4) Getting my hair wet now seems like an enormous ordeal. I'm now understanding where the "I'm washing my hair" turn-down line came from.
5) I just don't feel clean.

As Christa d'Souza wrote in W, "I can’t help feeling like a piece of vintage clothing that hasn’t been properly dry-cleaned." It's not that I feel dirty; it's that since September, I haven't felt that super-clean, super-breezy feeling you get when every inch of you has been properly scrubbed and rubbed and cleansed and patted dry. And I miss that feeling, particularly after a great session at the gym where my body feels all stretched and fantastic...and that feelings ends at my scalp.

But, dammit! At this point I've reached the pinnacle of We Great Unwashed: My natural hair oils have coated the entire length of my strands, my hair is in great shape, and it's almost summer (humor me here), which means updos, which will take care of problems 1-4 above (I don't bother to blow-dry my hair when it's going immediately into an updo, so getting it wet isn't a problem). I'm not sure whether to consider my time investment a sunk cost or to charge forward.

Hmm. I ask the Washed and the Unwashed alike: What to do? Giddily shampoo? Try baking soda and apple cider vinegar? Be a hair warrior and stay unwashed? Another option altogether? Be candid now, please. And vote in the poll on the sidebar!

PS: Still haven't washed my face. That, for whatever reason, feels totally fine.