oil leak around spark plug on 2001 Nissan Altima

my oils leaking around the spark plug box thing what do i need to do oil is everywhere under my hood and how can i get the oil off everything?

Asked by for the 2001 Nissan Altima
Replacing the valve cover gasket is a straight forward job. First place oil drain pans under your engine and spray on a commercially available engine degreaser like Gunk or Castrol Super Clean that should be available at any local parts store. Follow the instructions allow the chemical to settle before washing off completely with a hose. Avoid excess contact of water between ignition components and alternator. Dispose of the waste properly afterward. Replace the valve cover gasket and check that the PCV valve is functioning correctly. A sticking PCV valve can contribute to oil leaks. You may find more information at
http://www.autozone.com/N,9016851/initialAction,repairGuide/shopping/vehicleSelect4.htm
on how to replace the Valve cover gasket.
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