Unless its mud mucky water etc just drops off and when you get home a quick hose down with water is usually enough to clean it.
Cleaning carbon fiber bicycle frame.
It will nicely touch up clear coats over natural carbon frames.
I use either a little wd 40 or the orange based cleaner i use on parts sprayed on a shop towel to clean most everything on my carbon bikes except the brake surface on the wheels.
Nail polish is cheap includes a brush built into the cap and it dries fast too.
Use car dash board panel wipe to polish your bike its a far higher silicone content than most polishes.
Or use a coating of car wax.
Yet as with any bike it s never a good idea to aim the water directly at bearings headsets cranks etc because that can wash the grease out.