Hi Ian,
Interior valets cane be as little or as much as the customer wants. Most of them just suddenly realise that the interior of their car looks disgusting, (or worse)
and want you to make it look beautiful again, (bit like plastic surgery).
The 'kiddy' and 'doggy' ones are usually the worst and will normally require HWE. This is always an awkward one because in an MPV you can spend nearly as much time as cleaning a couple of sofas, but can't really charge as much.
I do some work for a garage & they are just testing a 'Deoderising Bomb' basically in aerosol form, pop it in the 'smelly' vehicle, press the button and it goes off for approx 3 mins completely impregnating the interior with a choice of lovely odours, (Hi Karate/Old Spice that sort of thing)
. Or in this case, the car, their office and the streets within a 100 yards of their premises
I do some local advertising but fortunately most comes by word of mouth or people seeing me do the job in their street. Or they come out to see where the nice aroma is coming from like the "Aah Bisto" advert