The white dirt on the glans can be cleaned up with warm plain water, mostly caused by dirt stored in the folds of the foreskin and bacterial infections, mostly caused by mycotic infections. Male friends should develop a good habit of washing the external genitalia every day, especially if the foreskin is too long, the foreskin back to the glans, the dirt stored inside clean, if they suffer from diabetes, plus do not pay attention to hygiene, do not often wash the genitals, easy to induce mycotic infections, and if the lover suffers from mycotic infections, infected by sexual life, more attention to the glans cleaning, just cleaning, do not rub hard, and do not apply the same to the glans. Do not rub hard, do not apply a variety of detergents to avoid causing allergies. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The best thing to do is to change your underwear every day, wash your bed sheets, and expose them to the sun.