Few things to know in order to understand why this wont happen.
First a CPU sits in a sealed case, it resides in the center of the metal cover, usually taking up 1/2 the available space.
Around the processor there is a rubber gasket that is glued to the metal cover and silicon wafer board, his is covered in thermal paste up to the metal cover. The outside of the case is also sealed with a rubber gasket which is glued in the same way to the wafer board. This is the sealed part of the processor. It has to be air tight. Any humidity or liquid that get's into the case will destroy the processor. CPU's are built in billion dolor environmentally controlled facilities because they are extremely susceptible to dust and moisture. They are vacuum sealed before leaving.
Your processor could and probably would survive a dunk In a toilet, if it wasn't powered on, because the case is so well sealed.
So, I wouldn't worry about getting anything on the processor, if you did there was probably more wrong with the processor to begin with.