2006 Kia Sorento head light

[rhandwor]

I noticed a drivers side head light wasn't lighting. I stopped at Auto Zone and purchased a new bulb. I was going to install it and as I wiggled the wires it lights up properly.
I talked to a friend with a foreign vehicle he said salt water corrosion sometimes happens on the ship.
I disconnected the negative cable and pulled the electrical center I unplugged the plug for the headlights and sprayed with contact cleaner. I cleaned the grounds also and so far it is working properly. I noticed a lot of people are having bulb problems. You can clean and spray plugs near the bulb with contact cleaner. Also clean the ground.