I Have An Evil Floor

We've been in this house for about a year now and I swear I've not been able to get the dining room floor clean once.

The problem.

Its a porous floor.

Which means that any normal floor cleaners make it look awful. I know I need to get a finisher on it to make it shine, but I'd like it to look clean first and no matter what I do, that just doesn't seem to happen.

It is terribly frustrating.

I can use my swifter wet jet on the kitchen floor, but not in the dining room. It totally screws it up.

My floor is 100% evil.

Any hints as to how to clean this bastard would be greatly appreciated.