How do I keep my bamboo floor from getting black dirt inbetween the factory-finished planks? There is also a dull grey cast to areas that have heavy traffic.....

sounds like you been using wet swiffer or water to clean the floor. Stop that!
No easy way to clean that out, so get on hands and knees and clean the joints.
Sorry

What should be used to clean my bamboo floor? I have heard so many different opinions......obviously all of the wrong ones!!

Vaccuum Regularly with cannister style vac, horse-hair bristle head on the long atatchment (just like the ones us pros use before we put down finish) try electrolux or talk hubby into springing for a cool central vac in the home

Anyway, Look for neutral ph hard wood floor specific cleaners at your local box store. Bruce brand is decent. Many local flooring shops in your town will probably cary thier favorite brand of cleaner too. BUT no Murphy's oil soap or pledge or johnsons or old english or anything else that leaves a soap or wax residue. If it is too late and youve done that ask you local floor shop for a concentrate of thier favorite brand (Bona Kemi, Poly care, Glitza ... )and mix it rich to exfoliate the floor then rinse with damp (not soaking wet) towels. Never use these products like a WET mop. Most come in a spray bottle for a reason.


Hope this helps.....

Will is spot on regarding maintainence. You know, this link is right above the message board link. Did you see it?

http://www.hardwoodinstaller.com/hardwo ... orcare.htm