The best time to clean your belly button is during a regular bath or shower. Make an effort to include your belly button in your daily washing routine. You may need to wash your belly button more frequently if you’ve been sweating a lot (e.g., after exercise or when the weather is hot). You don’t need anything fancy to wash your navel. Warm water and gentle soap will do the trick just fine! Apply some soap and water to your fingers or a washcloth and gently rub it into your belly button to get rid of dirt, grime, and lint. When you’re done, carefully rinse away all the suds.  In general, the soap or cleanser you use for the rest of your body should work fine for your belly button. Use a gentle, unscented soap or bodywash if scented soaps cause drying or irritation. You can also use saltwater to gently cleanse your belly button. Mix 1 teaspoon (about 6 g) of table salt with 1 cup (240 mL) of warm water and dip a washcloth in the solution. Carefully massage the saltwater into your navel, then rinse it away with plain water.  Saltwater can kill germs and loosen dirt, and you may find it less drying and irritating than soap. It’s easy for dirt and lint to build up in a deep belly button—and it can be challenging to get it out! If you have an innie, you may need to use a washcloth or a cotton swab to get inside and do a thorough cleaning. Swab out the inside of your belly button gently with soap and water, and make sure to rinse it well afterward. Don’t scrub hard—you could irritate the delicate skin in and around your belly button. It’s important to keep your belly button dry to prevent an overgrowth of bacteria and fungus. Once you’re done washing up, use a clean, dry towel to gently dry the area in and around your belly button. If you have time, you can also let it air-dry for a few minutes before putting on clothing. You can keep moisture from building up in your belly button by dressing in cool, loose clothing when the weather is warm or any time you might break a sweat. Don’t use any creams or lotions in...

TL;DR in Indonesian:
Cuci pusar setiap kali mandi. Gunakan sabun biasa dan air untuk membersihkan pusar. Lakukan pembersihan mendalam dengan kain lap atau kapas tangkai. Tepuk-tepuk pusar sampai kering kalau sudah selesai. Usahakan tidak mengenakan minyak, krim, atau losion di pusar.