Can i clean the female insides of my powercables ?

The endless jokes possible here are going to make it impossible to answer your real question. I cannot, for reasons of modesty, make any of those jokes... But you are asking for it.

Well, in an effort to keep this from devolving as Elizabeth so correctly suggests it might... Grisslehamn, the best way to do this is going to be to simply connect and reconnect the power cord several times. The wiping action of the metal parts connecting will clean the interior surfaces. If you suspect corrosion, you could add a bit of Caig DeOxit to the surface of the male pins and then make the connection/re-connection. Your biggest risk is spreading the contacts so that a tight connection is no longer possible.

If this is a modular plug, you certainly could disassemble it, clean the contacts and reassemble. But, I wouldn't recommend that unless you have a serious problem to resolve and you're trying to save the cord rather than discard it.
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LOL!!!

This is a delicate procedure and can lead to your cable's inability to produce further electrons. It is also liability risk, so make sure you talk to your cable and explain the possible outcomes.

Try a pipe cleaner w/Caig on it. Watch that the fibers of the pipe cleaner don't let go. You can clean RCA's and female balanced connectors the same way.