After you come back from a trip, you can use an organic solvent (detergent) to soak in water and then wipe the frame and parts with a rag. But remember to clean the water on the car with a rag with strong water absorption after washing, lift the front part of the car, control the water in the frame or let it evaporate naturally.
It is best to wash the bearing part with clean water, as long as the lime soil is removed.
It is best to use a cloth strip for the flywheel, and every tooth should be wiped. Tighten the two ends of the cloth strip, let the cloth strip enter the gap between the two teeth of the flywheel, and pull the cloth strip back and forth to remove the sludge inside. And wipe the cogging on each flywheel.
After cleaning the chain with a rag, add a few drops of lubricating oil and wipe it again. After the oil stain is thoroughly cleaned, add a few drops of lubricating oil, manually rotate the pedal position and change the speed, so that the oil on the chain is fused to the flywheel and the front tooth plate.
As for maintenance, just remember to keep the tire pressure at least 2/3 at any time. Chain and tower wheel are cleaned and dripped with lubricating oil irregularly. Every 1/2 years, a few drops of lubricating oil will be dripped into the conduit to keep the braking and speed change stable.
The above is my experience in cleaning and maintaining after riding. Regarding maintenance, I suggest that novices should go to the car shop for maintenance.