You should check that the windows on your vehicle are clean inside and out a) overtime you prepare to drive b) once a week c) only as often as you fill up with fuel

The answer is C.

Explanation:

This will solely depend on the effort the owner of the car is willing to put. However, it is recommended that you do it as often as possible. As often as every time you prepare to drive or only as often as you fill up you gas tank. We have to be very careful with everything that is inside our cars, and especially the windows. We have to keep the windows clean to avoid fatigue while driving. Use the right products and the right technique to clean your car windows or else, you will be left with a messy finish that is more distracting than how it was before.