Bought a used PS4. Opened the hard drive cover and there were dead roaches inside. How do I go about cleaning it in the best way I can?

Pretty much as title says. The guy posted it on Facebook as the disc drive not working and would sell it for the best price. I offered $50 and it was a deal. I opened the hard drive cover and saw this. I was planning on taking it apart and cleaning the dust on the inside but it seems I have some other cleaning to do now. How do I get all of this crap out and get it as clean as possible? This is my second PS4 so I'm trying to flip it for a profit.