Final rinse in the Paterson System 4 tank for 35mm and 120 film: 600ml boiled water (or tap water - it's good around here), to which I add an APX100 35mm film-container-capful of Ilfotol, which happens to be 3ml exactly, and agitate by spinning the reel for about ten seconds then standing for about a minute.
Whilst film is in the tank, I run the shower briefly and wash my hands, then hang the film on the shower door top bar. Two fingers once down the film and that's it. Incidentally, I stopped drying the tank with either cloth or paper as I was getting residual chats off the cotton that sometimes appeared on the next film I developed! Just a wash in hot soapy water and dry naturally upside down on the window-sill.