said by robbin:
...it doesn't add any more as the fill valve is still closed. Basically it just keeps reusing the same water.
I remember a thread not very long ago that the person was asking why their dishes weren't getting clean. They had the same problem. The best part was, they continued washing dishes using dirtier and dirtier water ! You think the standing water, that had to start smelling, in the bottom of the dishwasher would have gotten noticed.