This is a timely subject, as I came here to ask some very similar questions about cleaning and lubrication.

Cleaning:
Took a little road trip with a buddy of mine to a track about 1.5 hours from home yesterday. Amazing outdoor track, but it was super, super dusty. Here's a video of a few of my first laps (don't judge, I'm still pretty new to this! ) if anyone is curious. Gave the buggy it's first really thorough cleaning when I got back home, and curious if this seems OK. Here's what I did:

1. Blew off as much of the loose dirt and debris off with a compressor as possible.
2. Gave a few generous sprays of Simple Green front and rear, being careful to avoid electronics.
3. Back to the air compressor to blow off the Simple Green. Wiped down with a microfiber towel.
4. Removed front and rear suspension assemblies.
5. Cleaned front and rear of chassis with Simple Green, rinsing with a small amount of water in a spray bottle, and wiping down with a microfiber towel.
6. In a small plastic tub, gave a generous helping of Simple Green to the front and rear suspension assemblies. Let it soak for about 5 minutes.
7. Back again to the air compressor, blowing off any excess Simple Green.
8. Here where I'm wondering if I messed up: I was rinsing some of the harder to reach areas with small amounts of water using the "stream" mode of a spray bottle. Very, very effective, but I'm wondering if I should be doing this. Is this a terrible idea?
9. One final wipedown with a microfiber towel on all components, then set it on the shelf to dry overnight.

Lubrication and Bearings:
What exactly should I be lubricating? When I finished cleaning using the method above I sprayed the moving components of the steering/suspension linkages with some LiquidWrench. Sounds like maybe a silicon-based lubricant may be better? I'm definitely open to suggestions. Seems lubricating the bearings, provided they don't need replacing, is a good idea. What would I use to lubricate these?

On the topic of bearings, which ones should I be checking most often and at what interval? Which bearings are less important, but should still be checked? At what interval? I'm considering picking up one of these bearing kits I've seen linked just to have some extras on-hand.