Is my Intel cpu clean enough?

[andrescelano]

Hi, I just cleaned my fan with some 50% alcohol but there are some black things on it. Can I use it or do I need to clean it with a stronger alcohol? Here is the image.
https://imageshack.com/i/ipoR9K1lj

 

[turbopiki]

its fine. now put i pee size of thermal paste on your CPU and let the weight of CPU cooler spread the thermal paste

 

[andrescelano]

cheers mate.