How old is your baby? I clean my baby's tongue after every feed with a towel (after she burps) so there's no milk residue. I also drip a few drops of water into her throat after her feed to "wash down" her milk so there's no residue in her mouth.
My bb just past 1 yr old. yes, i saw that there are white residue on her tongue but she refuse to open big when im trying to clean her tongue. *troubled*.