How do I clean my baby’s tongue? It’s so white from all the residue.

Use the baby hankerchief. Wet it with boiled and cooldown water and scrub it with your finger cover with that hankerchief. Make sure your hand is washed properly. The water if can use a dedicate bottle just for your baby. There special tongue cleaner out there. I think it is just gimmick. The hanky method works for kids since when they are babies.