Momshie, yan talaga kailangan ng professional cleaning from a dentist, walang home remedy na talagang makakaalis ng deep stains, lalo na if it's buildup or discoloration na matanda na! A few of us tried whitening toothpastes and oil pulling pero honestly, temporary lang and hindi effective compared sa proper dental scaling. Best to set an appointment na with your dentist so they can check kung ano exactly ang cause, sometimes it's just tartar, sometimes it's something else na kailangan i-address. In the meantime, brush twice daily and avoid coffee or smoking kung yan ang culprit. Kayang kaya ito i-fix ng dentist, momsh!