How can I hygienically wear a thong and wipe my bum?

I am curious to know whether there is any right and wrong ways to wipe one's ass! Is wiping sufficient or should it be cleaned with water thereafter? I've heard that people use water to clean, which is regarded as more hygienic in foreign countries.

How safe is wearing a thong in terms of hygiene after a bowel movement? I wonder because a thong literally sits right on the anus. Are there any products available commercially for genital hygiene?


What can I do about salty sweat stains?

I've been a good kid working out and being healthy, but the gym I go to has uniforms and I always wear a black t-shirt. That's great, until I sweat and it leaves salt rings where the sweat reached out to. Ewwww. This is embarrassing, and I have to wash the shirt before I can wear it again, which is annoying since I go almost every day and need to re-wear shirts once or twice. ANYWAYS, how can I reduce the amount of salt in my sweat, and prevent these embarrassing white rings from forming on my clothes? Eating differently, drinking more water, help!