How should I clean my old hardwood floors?

The most efficient way is to use a damp mop. Never use a wet mop, because excessive moisture can dull the finish and damage the wood. A little extra water on your damp mop is OK for deeper cleaner. You can also clean wood floors using a canister vacuum cleaner. Some come with specific attachments for cleaning hard flooring. These attachments are great for removing dust and grit and are gentler on your floors than some other cleaning methods.