I sluiced out the stable with Jeyes Fluid after Kelly died (and soaked buckets and haynets in Milton fluid), and again the week before Sham arrived, but that was only done as a precaution as we're not 100% certain why Kelly got ill and died. Under normal circumstances I wouldn't have used disinfectant at all.
I believe that a stable should be a nice place to be, so should smell of the occupant, not pine and bleach!
Though I must admit I absolutely love the smell of Jeyes Fluid...