[Emission]

This is my front left blinker. As indicated by the red arrows, there is corrosion on the electrical contacts preventing the blinker from working (the parking light still illuminates). I've used a pencil eraser to get as much off as possible, but am unable to tackle the tight areas.

I know corrosion around the battery (acid?) comes off with baking soda. Will the same trick work here?

Is there something I can brush on and wipe off (or spray fresh water on)?