TBHLuCiFeR

I have a camera that got water in and it was just high enough to cover the light sensor. The one that makes it switch between B/W and colors. does anybody know what i can replace it with? i have seen some cctv with the LDR Sensor but mine looks like a normal diode with flat top. I have cleaned it so it does not look as bad as in the picture and it worked when I took it down