Haha alam ko yan, struggle talaga lalo na pag tag-init! One of my mum friends swears by regular exfoliating with a soft brush or loofah first, then applying whitening deodorant or cream consistently, kailangan talaga ng patience kasi hindi overnight yan. Marami rin sa circle ko nag-try ng lemon juice mixed with coconut oil before bedtime, pero dapat careful lang sa irritation lalo na kung sensitive ang skin mo doon. Honestly, I've found na ang best prevention pa rin ay avoiding tight underarm deodorants at choosing breathable fabrics, kasi maraming cases yung darkening ay from sweat, friction, and bacteria buildup lang.