The navel can be cleaned with body wash, cooking oil, soapy water, saline or iodine, etc. You need to pay attention to how hard you clean.
If the navel is very shallow, and the dirt is less, you can use shower gel to clean it off when you take a shower.
If the dirt has formed a hard lump, it is difficult to rinse off, can be used to cotton swabs dipped in a small amount of cooking oil or soapy water applied to the navel, to be softened and then removed, and then rinsed.
If the navel appears red, swollen, pain, you can use a cotton swab dipped in an appropriate amount of saline or povidone-iodine, clean up can be coated with an appropriate amount of erythromycin ointment or mupirocin ointment.
It should be noted that the navel skin is more delicate, there is dirt, can not directly use nails to pick the navel. If you accidentally hurt the skin of the navel, you need to disinfect it in time and go to the hospital.