how do clean the oil sludge out of the entire cooling system..

What is your question?

my oil somehow ended up in my coolant. i didnt have symptoms, no overheat or drivability issues. i had just decied to check my coolant and saw chocolate ice cream layer in the reservoir. so i drained the coolant and there is thick sticky oil coating everything...the reservoir, the hoses to and from the radiator, the water pump hoses, etc. it is a layer of gunk and so how do i get it out or flush it out of the system?