To think that "training" really greasy hair just isn't possible for some people?

Yes.... menopause has meant for the first time in my life my hair isn't as greasy....but now I have a wobbly belly and droopy boobs 😂

I think the oily skin (acne) and oily scalp are related. I am currently looking into malasseezia....a yeast/fungal overgrowth that grows on skin/scalp. I am currently trying to fight it.
My acne was never bacterial....I realise now it was fungal. When you understand that, it's easier to tackle it. I think my oily scalp is caused my malasseezia.

I wonder if what's more often happening with people that say they've trained their greasy hair is that they've washed it very frequently out of necessity as teenagers, kept the same schedule, then at some point stopped but by then they'd grown out of their teenage need for frequent washing anyway.

I think many of us with very thick or curly hair find it more of a faff. Takes forever to dry, even with a hairdryer, and that's before you even have to start making it into something that looks less like a pom pom

totally agree with several pps who make the excellent point that scalp is also skin and if you have greasy skin you will also have greasy scalp/hair.
I also find it odd how many people view washing their hair as a major stress and inconvenience. For some it might be? - perhaps due to disability or spending a lot of time styling it etc.
i wash mine daily, it takes 2-3 minutes in the shower. I do blow dry but only to brush it into place then leave it to air dry.
I have greasy skin, I find my hair picks up smells such as cooking. Overall I just feel more comfortable.
interestingly no one is telling people to train other parts of their body to be washed less.
most people are washing face/bums/teeth daily!

I tried too during Covid. Left it several days for maybe a couple of months. No change. Gone back to daily washing. I didn't change shampoo though. But it was such a relief the days when I was allowed to wash it. It just feels unpleasant when it's dirty. Not sure if that's real or psychological.

I agree with you completely OP! I tried the no shampoo or silicones method for FIVE years to try and make my curly hair more manageable but my scalp never seemed to produce any less oil. I had to incorporate things like baking soda and shikaki powder just to get the coating of oil off every so often.

I also have very oily skin on my face and have even tried cleansing my face with various oils to counteract the oil production but nope, just even more of an oil slick.

I hate when people tell me that I need to wash my skin less so it'll produce less oil... It's total BS in my case.

People with greasy hair usually only put conditioner on the roots and not the scalp anyway.

I totally agree and I also tried during lockdown.
I think some people may be able to do it because their hair is greasy for a different reason. Yours is presumably hormonal.
I have found it's gotten slightly better by itself with age, again probably hormonal.

Mine changed at menopause - i now wash it twice a week and could manage weekly with a good dry shampoo. Pores on skin also improved - if only I didn't have a plump tummy as well

My hair is not particularly greasy but it's thick and coarse and my scalp ends up an awful spotty, sticky, smelly mess if it doesn't get a good wash at least every other day. Vosene has been the best thing that's ever happened to it. I have some small scalp cysts from my very itchy and short lived attempt to at least go low-poo.

Annoying as it takes ages to dry, too.

Wash your hair in washing up liquid. Your hair will stay non greasy for ages

It had that effect on me, too. But the dry lips was an absolute killer, despite using chapstick, they were just a bloody, cracked mess.

I’m 65 and have never been able to go longer than 2 days between washes. I do it in the evening, I don’t find it a significant nuisance.
The idea that adding oil might somehow help - omg no! I’ve very occasionally got a tiny bit of oil in my hair, or unwisely used a fancy ‘natural’ conditioner in a hotel … urgh, it’s like a slick (hair is plentiful but fine and straight) and I’ve had to rewash immediately and sometimes it’s needed washing up liquid to degrease it.

I was just about to mention this - roaccutane will do it!

That is also my dream, 50% less washing would be amazing. I'm 49 and still awaiting the great dry-up we're warned about, i just can't imagine what it's like not having oily skin 🤔🤯

Yeah it’s not a thing, definitely not for me anyway! I have oily skin so oily hair I have to wash every day makes sense.

The only time I haven’t had to was when I was on Roaccutane for acne in my early 30s. Best hair days of my life! I could go days and it was like freshly washed, and I kept getting comments from people asking what I’ve done to my hair as it was looking so nice.

No, you're not going to be able to train it. Could you maybe wash it in the evening and wrap it in a warm towel while you do other stuff? Washing it in the morning sounds like a pain.

I too have tried loads of times and various methods over the years, I even tried the no poo method during Covid. Stuck it out for 6 weeks, then went to weekly washing with a gentle shampoo. I don’t think my hair got any less greasy and I developed horrible seborrheic dermatitis (as someone else mentioned). I’ve accepted it now, though I do every other day with dry shampoo on day 2.

I have fine straight hair and I’ve tried so many times in my 40+ years….. Just get a good dry shampoo 😂

Each attempt has been unsuccessful in varying greasy degrees - I think it’s dependant on hormones a lot of the time…. Which (for me) are not exactly consistent year on year, between pregnancies and peri menopause!

I have also come to the conclusion that I wouldn’t not wash any other part of my body for 7 days, so it’s odd to expect it from my scalp.

I have found dry shampoo at night (and from day 2, before it gets greasy), works well to gain couple of extra days

Yanbu OP and I’m exactly the same. I have horrendously oily skin and scalp and I’m an everyday washer too. The only time I’ve not been is when I was pregnant. So my oil levels, I presume, are dictated by my hormones and there’s no ‘training’ the amount of sebum that I produce.

Avoiding conditioners containing silicone (virtually all of them) is the thing that has let me go from daily hair washing to twice a week. Anything containing an ingredient ending in -one makes my hair look and feel disgusting after the first day. I don't believe you can train your scalp to produce less sebum.

Wouldn't you just! Holy Grail, and just as elusive!