Your lambswool throw started life on a lamb that spent much of it's time outside in all weathers. The wind, sun and rain kept its fleece clean. You can do the same.

When you feel your throw is becoming a bit stale, give it a good shake outside, on a light wind day and hang it out for the wind to wick away any stale smells and let the dust drop out of it.

If you really need to deep clean it you can either send it off to be dry cleaned or, and this is what I do, put it through a gentle wool wash in your washing machine. (Most of the newer British washing machines now come with a wool wash option, however I know nothing of machines in other countries).

If you don't have a wool wash setting you could handwash your throw in a mild detergent, let as much water drain as possible and then hang to drip dry.

Either way, once your throw is dry you should steam iron it using the iron to stretch it back to its original dimensions, as wool is very amenable to being reshaped in this way.