We just bought a house in california. It was built 1969 but one of the previous owners obviously did alot of upgrades including the floor (the flooring in the bedrooms do not match flooring in living room) What is the safest cleaner for an unknow finish? How do you tell if you have a wax or polyeurethane finish? I have been using murphys but have read in the forum thats a NO NO. The floor seems to attract and hold a lot of dirt... When I do clean it I must go over it several times for the rag to finally come up clean...