If your wipers aren't parking correctly (e.g., they're not fully returning to their resting position, or they're parking in an unusual spot), the problem is likely mechanical or electrical:
* Worn wiper motor: The motor might be failing, preventing it from properly returning the wipers to their park position.
* Worn wiper transmission: The linkage connecting the motor to the wiper arms could be worn or broken.
* Electrical issue: A problem with the wiring or the wiper control switch could prevent the motor from receiving the correct signal to park.
* Binding wiper arms: The wiper arms themselves might be binding, preventing them from moving freely. This could be due to debris, corrosion, or a damaged wiper arm.
To address the issue, you would need to diagnose the specific problem and likely have a mechanic or auto electrician address the issue, potentially replacing parts of the wiper system. Simply "adjusting" them isn't possible like adjusting a rearview mirror.