He may still be too young, the hair may not be ready to come out yet
A lot of people here don't have a problem, but personally I've always found strippng heads difficult
That hair is stubborn and doesn't seem to want to come out easily
I find it easier to fan the hair with one hand, like you would a hand of cards, and pluck the tips with the others.
Don't want to mislead you, but I think you can use a stripping stone on faces. Maybe someone else can enlighten us