Washed towels in the sun and now like sandpaper.

My DD always moans that when I wash her towels (ungrateful wretch) they go stiff as described lovetopaint.
So, I googled the reason and apparently it's because I'm using too much detergent.
Maybe worth a go? It works out a bit cheaper too.

Line dry and then 5 minutes to soften in the tumble drier.

I always use fabric softener and have never had sour or slimy towels but they are absorbent. I give them about 10 minutes in the tumble drier. If they are very crisp I add a wet tea towel.

Using fabric conditioner when laundering towels and tea towels not only reduces their absorbency but they will sour quicker once damp.

Personally, I prefer a scratchy towel I think they dry the skin better.

Once my towels have had a line dry I just give them all a good shake which tends to remove any stiffness.

Used to them like that as I’ve never had a tumble drier.

I agree, a brief spin in the drier solves the problem. I do mine ten mins they then dry soft

Yes don’t put comfort in your towel wash, as they can end up slimy.

I like rough towels 😂 I don’t like those velvet type towels that slide off the body whilst trying to get dried.

I would dry them on the line but finish them for a few minutes in the tumble drier.
I don't mind towels like sandpaper.

Tumble dryer is the only way to get them soft again, rewash and never mind the extra expense! Conditioner will make them really soft, but less absorbent. A couple of tennis balls in the tumble dryer helps!

Iron the towels with a hot iron, that will help to soften them 🙂.

Personally, I like a towel like sandpaper, it's good for exfoliating the skin 😂.