I have found that it is important to make sure no fecal material or liquid reaches the urethra. If this occurs even without your being aware of it a bladder infection will follow. I am careful to always wipe from the front to the rear. As I age I find that it requires I pay careful attention to this. As will, after a bowel movement I place a tissue in the rectum to prevent any mucus from coming out of the rectum and making its way to the urethra. Since doing this I have had zero bladder infections. I am 77 with lichen sclerosis and this care works for me.