I have 2 bore snakes, one soaked with solvent, the other with oil. I clean as usual, run the 2 snakes thru and I am done.
When they get filthy, I wash them with dish detergent, then run them thru the washing machine inside an old pillow case.
The local sewing shop or Hobby Lobby for cheap cotton cloth, a utility knife and good straight edge is your best bet for what you want to accomplish.
Chiseled out of stone