Hi mama! Congrats sa 9-month-old mo! Para sa belly button, yung best approach is to keep it clean and dry lang, wipe it gently with a clean, damp cloth during baths, then pat dry completely, walang need ng special products pa talaga. A few of us moms just made sure hindi siya malalibo ng damit or diaper, at natural lang bumalik ang belly button to normal as baby grows, pero if may signs of infection like redness, swelling, or discharge, dadalhin mo agad sa pedia para ma-check properly niya!