After removing their insides. You want to clean out the bloodline. This lies underneath the spinal column. Use your thumbnail and start at the tail end and run it towards the head pushing out the bloodline.
Wash out thorough , season body cavity and throw on a hot charcoal grill. Delicious!
I clean them by making a cut up the belly , starting at the anus and running up about inch or so from their jaw bone. Make a cross cut to separate their tongue area from the jaw bone. Grab that inch or section and pull down stripping out gills and the entrails in one motion.Then clean out the bloodline. If you want to skin them to fry, snap the head back , breaking the backbone and then peel skin off in one motion.It is pretty quick after you have done several hundred over the years.