i noticed that my DD had all this yellow looking gunk on the top line (near gum) of her top teeth this morning. admittedly i did forget to do her teeth yesterday, but could it build up like that in just one day? i touched it and it was soft not hard, and then when i brushed it it came of relatively easily. i find doing her top front teeth really hard actually cause she always pushes her tounge out to cover them up.

any ideas on brushing technique?

and is the yellow stuff plaque? so if i hadnt have brushed it off it would have grew harder and then caused decay?

also, can it buil up so quickly in just one day?

thanks.