The Florida house has had a flood. We left September 2nd and for a whole month there was a leak from the upstairs laundry. Luckily friends of ours came down and discovered the flood or it may have gone on for another month. The upstairs hall floor needs replacing and a 4 foot square piece of ceiling below, but some of the floors on the ground floor got wet and have since dried. These floors are Engineered hardwood, so pretty rugged. They are not damaged except for these white marks left where the water had dried. Does anyone have a suggestion as to how to remove these marks. They look like the rings you get when you put a wet glass on a waxed table or a hot dish on the dining table. I would appreciate any ideas.