High pitch whine whistle hum from compressor

[COLOR=#333333]My Kenmore refrigerator has developed a low decibel high pitched whine or hum. It did not always make this noise. I would equate it to a constant ringing sound in your ears, which is incredibly annoying. Keeping me up at night annoying. [/COLOR]
[COLOR=#333333] [/COLOR]
[COLOR=#333333]I’ve unplugged the freezer fan and it is not the source. It seems to be coming from the compressor area. According to the schematic there is a condenser fan as well, but I am not seeing it anywhere. There is a fair amount of white grease like substance running down the sides of the compressor. I assume this is not normal. I will post some pictures of the compressor so you can see what I am talking about. [/COLOR]
[COLOR=#333333] [/COLOR]
[COLOR=#333333]Anyone else had this problem before? [/COLOR]
Compressor 006.jpg (114.8 KB)
Compressor 007.jpg (120.4 KB)

Does anyone at least know why there is a white grease like substance running down the sides of the compressor?

I have always thought that that noise was the compressor going bad or leaking freon - you will most likely need to replace the compressor and recharge the freon. if that is an older refrigerator you might be better off replacing the fridge itself but i would wait to see if you get any other advice