At this time of year, rainfall is usually quite high.
High rainfall can make your car dirty, and the windshield is no exception.
Dirty car glass must be cleaned with the help of wipers.
At wipers In each car, there is special water that can be sprayed onto the front and rear windshields.
In times of need, water wipers on the reservoir tube needs to be drained.
As quoted from GridOto.com, on the tube section reservoir it is mandatory to drain periodically.
If you don't drain it regularly, the effect can be troublesome when you want to use it.
Wiper water that has not been drained or replaced for a long time will become cloudy.
This cloudy wiper water can cause the motor to wipers become stuck.
When it is problematic, it is certain that the wiper water will not be able to be used.
Dirty windshields cannot be cleaned by a pump or motor. wipers problematic.
If the pump wipers If it is badly corroded, it should be replaced with a new one.
To prevent this, you must at least drain the water wipers every 6 months.
Last but not least, you should use additional water wipers specially formulated to clean car glass.
EN 
ID