To think my DH is being a big girls blouse about the the washing?

I find that after line drying in the summer when I'm putting it all away I get hay fever symptoms as clearly there is pollen trapped in the fibres which is disturbed by the process of moving and folding the washing. So I can accept that people with strong allergies can react to laundry in some ways. But if its having such a significant impact on the family that he's complaining about it constantly and its affecting their marriage then he needs to see a doctor and get allergy tested. I wouldn't be living like that for much longer.

Adding half a cup of distillled white vinegar to the final rinse cycle is supposed to remove laundry detergent more effectively, maybe worth a try. You could try something natural like soap nuts maybe? NB These apparently do have quite a pungent smell when wet.

Originally I had a chuckle and sympathised with OP as the DH is being irrational here.

But... given the backstory it is possible OP has developed a phobic/ptsd/ocd response as a way of controlling and managing previous experiences.

Either way @KarenNotAKaren, your dh needs to seek professional help either in allergy testing or for phobic/irrational responses. I giggled at you testing your hypothesis so I'm pretty sure your dh isn't allergic. But his reaction could be a genuine response to previous trauma which has not been dealt with.

I would be sympathetic (but secretly irritated) until the point where he refused to seek help for his 'allergy'. But I love line dried clothes and can't wait for dry weather!

Has nobody noticed OP said she took a wet wash out unbeknownst to him and he never said a word?
Also 'has that been line dried' how can he react to dry item?
He sounds ridiculous, if he's insistent tell him to get allergy tested.

I clicked on this thread to see if anyone had complained about ‘big girl’s blouse’ and I wasn’t disappointed.

Reminds me of my dear departed dad.

This

I was feeling sorry for him until your experiment

He sounds like a massive baby. 🙄

You could do an extra rinse cycle - that might convince him he's ok. I mean if he doesn't have a reaction when he doesn't know it's there, that might be enough to convince him that the wet washing is now harmless with the extra rinse.

Fabric conditioner on wet washing makes me wheeze
absolutely no idea why as fine wearing it when dry but still smell it
think it’s a sented humidity

Could it be more of an OCD issue? He's got something into his head and rational thinking doesn't come into it. His control is tumble drying everything? Either there's a real issue (OCD/allergy) or there isn't. He should be wiling to at least investigate the issue rather than the fix being tumble drying everything- if you have delicates/items unsuitable for tumble drying then it's reasonable not to tumble dry them.

If he can tell the difference and can express gratitude for efforts that are made to dry clothes in a way that helps him feel better, then I'd pander accept a compromise of 30mins in the tumble dryer to heat the clothes and get that tumble dried effect, followed by finishing them off on an indoor airer.
But I come from a family where people have more allergies and related illnesses than you can shake a stick at. And have found adapting easier than waiting for then next level of manifestation symptom.

Big girl's blouse takes me back - to the sadistic PE teacher in my school. He had a whole range of humiliating punishments as well as calling the boys girls' blouses. He liked to punish people who came last in races in the gym by making the last person, or occasionally the last two, do forward rolls on a hard wooden floor to really give those vertebrae a good crunching. He also liked to make people stand on forms and sing nursery rhymes. We were at high school.

But my PE teacher would definitely have called your husband a big girls' blouse. I say that as a person with very bad eye allergies.

Is it WET washing that he thinks he's allergic to? But not dry clothes? That doesn't seem likely. Like - not fabric dust, but the fact of the fabric being damp makes him sneeze? What?

Doesn’t “a big girl’s blouse” imply flimsiness of the blouse, not the girl.

This.

how many loads does he do compared to you?

YABU for using that phrase in your title.
Gross.

I had to look this up but apparently Hygrovestiphobia is a thing. Maybe that's the issue if he's spent a lot of time in puddles.

Try something like Surecare. No perfume, etc. Non-biological. I can smell the perfumes from the washing powder on my DCs clothing when they come back from their dads.

Interestingly, a maiden is another name for a clothes horse.

So is he seriously claiming to be allergic to wet fabric (as opposed to the detergent or softener you are using?) I mean, that's not a thing, surely.

Honestly you speak about him horribly. If my partner spoke about me this way I would be leaving. and why on earth would you use such a sexist phrase 'big girls blouse"??

I think he should go to an allergist and be scratch tested for environmental triggers (not pleasant!). But seriously, if he does have an allergy, he should know about it so that it can be properly managed. Send him to the doctor for a proper conversation. If he wont, you can rightly refuse to pander to his anxiety as he is clearly not taking it seriously himself

Get him to take an anti histamine

You clearly did a scientific experiment proving that his reaction is imaginary so no you're not being mean, you tested your hypothesis! I do love my tumble dryer though..

No idea, I just came on to see how many people would pull you up on “big girls blouse” - haven’t heard that for ages!