There’s always residue. You’re just diluting it by wiping repeatedly. Before I was a bidet convert, I was a very thorough wiper. Now that I’ve experienced both, I know there’s never enough dry wiping.
Bacteriophages are a great secondary option. Similar to how bacteria quickly evolve resistance to antibiotics, bacteriophages can quickly evolve to circumvent phage resistance.
On and off for the last five years. When I stick with it, I weigh less, have more energy, and things hurt a lot less. I also have a shit ton more free time each week.