Mark ,i don't understand why you keep saying its unprofessional,cleaning a rug in someones house can be risky buiness especially a large rug ,if the conditions are right and the customer is more than happy with that whats the problem.If its to big to take it off site,it seems silly to walk away when there is a simple solution ,whats the worse thing that can happen apart from having a happy csutomer with a clean rug and a cc who is a few quid better off.
Cheers mark