funnily enough i was going to post on this subject but steve beat me to it! i cleaned a low profile cheap polyprop last friday afternoon, it was an end of tenancy, the letting agent said it was still damp on monday lunchtime! obviously there was no ventilation but i was still surprised, i had to go back there today for something else and it was dry by then but it makes you think. i always tell customers to allow ventillation when they are in but if they go out which they often do rather than walk on clean carpets, our name might be mud!!
colin