I've no idea why it's always, always blue. All I do know is that there's never any gromph in the morning, but as the day goes on it starts to gradually appear, and by the afternoon Samuel is covered in the stuff. It's under his neck, in the palm of his hands and in all of his creases - he's half baby, half gromph.
So what is it? Sweat, milk and teething dribble combined with fluff from clothes, toys and sleeping bags? Or is it some kind of alien ectoplasm or soggy moon dust? Who knows. Babies are full of mysteries.
What word do you use to describe the gromph? I'd love to hear!