The only way to say definitively that a coin has not been cleaned is if you have never done so, and if it's been in your possession since it was struck. It does look to have marks that could have been left behind from a good scrubbing - see in the center of the reverse there where are lines? And the difference in coloration between the field and the lettering? These are some of the signs that a coin has been cleaned in the past; nalaberong was just making that observation.
If all those lines are raised, that's a different story - pictures can be deceiving, but from how it looks, they are not.
That's a great die crack, DV!