Use baby wipes on everything with paint. You can also clean the braking surfaces and tires with these. They are cheap, don't have any nasty chemicals, and are SUPER easy to use and it's easy to do a quick wipe whenever you feel like shining it up. DON'T USE WD40 ON THE DRIVETRAIN. Heavy solvents run the risk of drying out the insides of the chain and the residue will ruin new lube that you apply. They also run the risk of damaging some plastics, like those used on your derailleur parts. Use some good lube and just wipe the chain down, if you keep it clean you don't need to use a heavy degreaser ever.