A bit of a strange one this.
I wash all the clothes using branded products: Daz powder and Fairy fabric conditioner.
All the clothes come out smelling nice and fresh.
However, when they've dried, 2 of my woolly jumpers smell .... well the best I can describe it is a cross between sick and a doggie smell.
This problem is only isolated to these 2 jumpers. I don't get it, they smell lovely when they come out of the machine when they're slightly damp, but when they're dry, they smell quite vile. I tried washing one jumper 3 times in total - no joy. I tried spraying them with fabreze - that kinda helped, but it still doesn't explain why it's happening.
The jumpers are quite old, but in good condition, so I'm thinking if the age of the wool has anything to do with it, as there doesn't seem to be any other explanation.
The problem has only just started recently and I haven't done anything differently .... have my woolly jumpers finally passed their best before date lol ??
I've just been to check and both my jumpers smell nice and fresh.
I've no idea whether it was washing at 60 degrees; or using Dettol antibacterial laundry cleaner; or a combination of both, that worked, but hey ho .... I'm not complaining .... result :)
Oh, the phenomenon you described is most commonly found in towels and also sometimes underwear, it can be very noticeable and some people refer to the fabric being "sour" - it is a bacterial/yeast/fungus cocktail.