Ian Johnston wrote:

: : In the next day or two I'll be laying up the DS for the winter. She
: : lives under a cover in a nearby barn. Experience is that she stays
: : nice and dry but that there is a bit of a stale whiff inside after six
: : months. Anyone got any bright ideas about what I could do to counter
: : that? I thought of Magic Tree / Feux Orange / etc but I don't really
: : want her to smell like a Milton Keynes taxi!
: :
: : Leave the windows open?
:
: Mmm. Bird**** on the seats.
:
: Tie the cover down more securely?

And there goes the ventilation.

Been there, tried that!

What do you think's actually causing the stale whiff? Are you sure it
isn't dampness? I'd be inclined to run a dehumidifier in the car for a
day or two before laying it up.