You can easily unscrew the front element and then can get at rear through shutter. Not a big deal.
Both the front and rear cells will unscrew from the shutter. I wouldn't reccomend reaching through the open shutter to clean the inner surface of the rear cell, there's too much chance of leaving something in there or damaging the shutter/aperture blades.
It may take some more-aggressive-than-lenscleaner solvent to remove the haze. Try isopropyl alcohol (rubbing alcohol, 90%)