Why does my car's air con smell so bad?

Is there a good way of getting rid of the "wet dog/smelly socks" odour which comes from the air conditioning when it is first switched on? It seems to clear after a while but it is really unpleasant. Have tried "bombs" from Halfords etc. but they seem to be short term effective.

Asked on 11 July 2016 by Peter Rustage

Answered by Honest John
Very simple. Run it at maximum temperature for 15 minutes. The smell is coming from bacteria that has grown on condensation in the ducting. To get rid of the smell you need to dry out the condensation and the heat should also kill the bacteria. Always a good idea to run a/c on max temperature for a minute or two at the end of a journey in order to evaporate off condensation in the ducting.
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