How do I open the Ricoh 1810L laser to clean it? What do I need to clean?

There are two screws on the side cover on the left side of the machine, so you can remove the cover in the middle of the machine that is used to catch the paper

Then you can see the laser assembly, which is black and has two plugs and four screws, and you can remove the laser assembly. There is a screw on the laser assembly, and you can unscrew it, and there are four hooks, and two of them have rubber retaining pins, and you can remove them and remove the laser. Wipe the six prisms with a cloth, and you're done.