okay i might be a bit freak about this but i do the following after each race, it makes me feel good about the car and 100% sure that nothing is wrong, if i loose the race, its my bad not the car's
1- remove engine/ servo tray
2- spray car with water (to remove the dirt and dust)
3- spray the car with Simple Green and let it sit for 5 minutes
4- respray the car with water to remove the simple green
5- dry it with air (compressor)
6- spray WD40 on all bearings and steering post (if you are not going to take the car apart)
7- take the whole car apart
8- clean all bearings (take the rubber seal out and clean with gasolin, relube them and put the seals back)
9- inspect all parts for wear and change when you have a doubt (plastic and shafts)
10- new diffs oil (every 2 races)
11- new shocks oil (every race)
12 clean the engine, check for any loose screws, check the clutch shoes, replace clutch bearing (every race)
13 reassemble the car and you have a brand new out of the box car again
cheers
Ali