Nylon ukulele strings are rather durable and are less susceptible to damage from oils and sweat than metal wound strings which are often found on guitars. How often you need to change your strings depends on how much you play it. This could be every other month to about every six months. Restring your strings, if they need it, well before performances as the string will stretch considerably when your uke is first strung.
A piece of toast with peanut butter. Peanut butter should not cause diarrhea. In fact, the Cleveland Clinic recommends adding peanut butter to your diet if you develop diarrhea. If you are allergic to peanuts, however, diarrhea may occur after you eat peanut butter.
Dairy products such as milk and cheese cause diarrhea for some people, while others react badly to wheat and high-fiber foods. A little detective work can help you determine the cause of your diarrhea and identify any food intolerances you may have. Start by keeping a food diary and gradually eliminating triggers.