You can buy wool wash from knitting shops that doesn’t need to be rinsed.

Fill a big bowl or sink with lukewarm water and add the wash in. Submerge the jumper in the water and gently press it so it’s completely soaked. Leave it there for 10ish mins. Drain the sink and PRESS the jumper to get the water out. Don’t wring it or squeeze it because you’ll stretch it. Lay a towel on the floor, lay the jumper on top, another towel on top. Roll up like a burrito and stamp on it to get the water out. Lay flat to dry.

Sincerely, a jumper knitter

DO NOT PUT IT IN THE WASHING MACHINE. FOR THE LOVE OF GOD DO NOT PUT IT IN THE WASHING MACHINE. I made this error. Got a beautiful Aran sweater, wore it a few times and washed it. I set it to a wool setting and all. Low temperature etc. it shrank to fuck. It wouldn't even fit my toddler cousin 🤣

Here's a good guide on how to wash knits https://youtu.be/isx44rF_rtM?si=0TkV7YQadw0x-XNe

I used soak detergent on mine, it's pricey but you only need a teaspoon's worth for a jumper so it lasts forever. The main advantage of it is that it doesn't need to be rinsed so there's less chance of accidentally felting the jumper. But you can use a non-bio/wool detergent with the jumper. The main thing is to be very gentle with it when it's wet. 

I have a lot of pure wool jumpers. Wool doesn't need to washed often, so most of the time I just give them a good shake outside. I wash them about 3 times a year - on the wool/silk cycle on my machine, on cold, with specific wool detergent (Sonnett)

As a knitter who is well versed in wool:

I recommend Eucalan detergent. It might seem expensive but you literally only use a teaspoon per wash so it'll last you years.

If your washing machine has a delicate or wool cycle that you trust to not ruin stuff, you can use that. Make sure it's cold. When it comes out after the spin cycle it's going to be crumpled so you're going to need to shape it by putting your hand into he sleeve and stretching it out flat to how it's supposed to be and making sure the sides are parallel. This shouldn't take any actual stretching and pulling, just straightening. Lay flat to dry.

To hand wash: put the Eucalan and the jumper in a bucket or sink and let it soak for 15-20 minutes. It's non-rinse so unless there's a lot of dirt you just drain the water out. If there's dirt you can repeat it a second time. Don't rub but you can squish and scrunch it gently.

Now you squeeze the water out. Don't wring it like a rag, that will ruin it, you should squeeze instead. Then get a big towel, lay out the jumper and roll it up, and squeeze out more water by standing on top of the roll. Now you can lay it flat to dry after shaping as described above

Remind yourself of the 700 years of tyranny and use your tears.

You will need a spring in a pasture and a nice spring day . Immerse yourself and the jumper in the stream and rinse thoroughly. Hang the jumper on a blackthorn bush or a rocky outcrop all the while looking out for crows .

After several hours with teeth chattering make your way home . Position yourself and the jumper by a turf fire for the evening and in the morning you will have a perfect aran jumper.

https://aranwoollenmills.com/pages/garment-care?srsltid=AfmBOoqCOS-HJycozDT2JuDoVOasIFAt-sFfx8sX7hnX1ZuNGd7EC-tZ

Hang it on the line & beat the shite out ofit

Soak it in cold water first. Then let it drain and squeeze some of the cold out. Wash in not much more than lukewarm water with a mild detergent like Woolite or Eucalan. If you use Woolite, rinse it a couple of times. Squeeze the water out, dry between two towels and the dry flat. Outside if its breezy or inside if you have a dehumidifier. Unless you live in it, once or twice a year will probably do. Wool shouldn’t hold smells or stains like cotton.

The only way is to bring your jumper to Innishman on new years day. Dip it into the Atlantic. Say 10 Our Fathers. No more no less. Take the jumper out. Put it on immediately while soaking wet and freezing. Sing the aul triangle, wolf down a bag of bacon fries...or scampi...up to you and hey presto.

Word has it, you won't need to ever wash your aran jumper again after the ritual.

If you have any questions, just read the above again, it's pretty straightforward.

God bless.

There is a great no rinse wool wash called Soak. Can be gotten in wool shops or Arnotts and BT’s have it in the lingerie section as well (ideal for hand washing small bits). Some great videos on their site as well.

Woolmark® (https://youtu.be/28MW0bGgcUA) [How to hand wash wool]

Wash it by hand in cool water using a gentle shampoo. Wool is animal hair and if shampoo is kind to your hair it should be kind to sheep hair.

My Mam always had hers dry cleaned

I handwash wool in warm water and use a bottle of handwash liquid from Tesco. Drying is the real challenge. Gently squeeze water and then use a towel for another layer of water removal Line dry wiht lots of pegs to keep shape or lay on clothes airer indoors. No rubbing, no wringing, no hot water, no hot radiatior.