Probably about all you can do is clean them and then put down a really hard clear coat (like maybe Bona's "Traffic" or Basic Coating's "Street Shoe" polyurethane) to restore the gloss on the floor for a while.
You can keep on doing that, too. After all, you have little to lose. I'd rather see the Traffic get worn off by rough and dirty shoe leather than the laminate. You can always put more Traffic on to replace what was worn off. But, you can't put the laminate back on.
I see this as a way to spruce up the appearance of the laminate and extend it's life as long as possible. There's no way to actually repair the laminate.
Apply the Lamanator Plus Deep Scrub by misting it onto the floor, about 50 square feet at a time, spread it around with one of the micro fiber mops that are included in their kit, let it sit for 3 minutes to begin to soften any other products or grime that was put on your floor by you or before you, and then apply Lamanator Plus Restoration by misting it on the floor, again, about 50 square feet at a time, and spread it evenly with the other clean micro fiber mop they provide in the kit. Also mist some of the product onto the clean microfiber mop head when you begin.Continue this process until floor is completely covered.