My friend spilled water without noticing on my parquetry floor and it had some time (12h) to stain the wood. I wonder, how can I improve the look, remove those dark staining at the edges of each bar. A picture says more than a thousand words:
EDIT on January 2014: The condition of the parquetry floor improved drastically over time. Yet some marks are still visible. In our case we do not need to repair it.