Help!, Door Sensor Problem...

[projzxr]

the other day it was raining and my car's stock alarm went. I found out the pasenger rear door sensor was not working right. I would push it in but no luck, but sometimes when I did the courtesy lights and gauge light went out. The lights were off only temporarily they'd eventually come back on. A little description of the thing is when you close the door, there is a little tap that gets pushed in by the door. Anybody know how to fix this? Would I need to get a new sensor maybe? grease it up? Anybody encounter this problems before? Thanks.

[SKperformance]

Common problem , buy some PB blaster and let it sit a few hours and reapply it should loosen the rust.