Here, I was going to say it's actually unhealthy to shower twice a month. This is some super-power nose blindness.
There's a guy who discovered a bacterial culture that works better than any deoderant, and for him eliminated the need to use soap on the hair or body. He still showers and uses soap on his hands, but reported that his hair and skin have been so happy and healthy that soap no longer made any sense. Dig into A2-Biome if you're curious.