Actually, this is very clear, but many people still don't realize that the cleanliness of the fuel tank cap is very important. The fuel tank cap on the car also needs to be cleaned regularly.
The tank cover on the car body will generally become dirty due to the amount of dust and water deposits attached.
This part rarely gets attention, even though if it is too dirty it can cause rust in the area around the fuel tank cap.
Usually when we wash the car, the part behind the tank cover is never cleaned.
As quoted from GridOto.com, Because it is rarely cleaned, rust will easily appear. The impact is obvious, rust will attack the mouth of the tank lid.
If it's badly corroded, it can cause a gap in the tank cover.
This gap allows water to enter the car tank, either during car washing or when it rains.
In order to avoid rust, it needs to be cleaned before rust appears.
Cleaning it is enough to wipe it so that dirt does not accumulate there.
When you finish washing your car or after a rain shower, you should open the tank cover and drain it immediately.
This method works well to keep the mouth of the tank cover from rusting.
Therefore, this is the impact if we are lazy to clean the car tank lid.
You have to be diligent in doing so because if you are not, it will definitely cost you a lot of money in the long run.
EN 
ID