Hey all! I just pulled an old Model M out of the local E-waste bin. I have no experience with this thing, I just knew of it existence. In general it seems like it's in good condition from the outside, it doesn't look yellowed, and there are no cracks, and it has the PS/ 2 cable. Can you guys tell me more about this thing? How do I clean it etc? (if possible due to it's age, I don't know how brittle the plastics are). Thanks!