That is just crap and I'd be upset too.
Nowadays, I ALWAYS charge more for a first clean, so if they dump you on visit no.2, then at least you're not out of pocket.
Also, I never clean for ANYONE who does not understand good English. Explaining the concept of pure water and how it dries clean is hard enough, but to explain it to someone who does not understand good English, can be misconstrued and lead to problems.