Even when babies are relaxed, they keep their little hands clenched in fists. This results in a build-up of lint.
No one told me that I would have to de-lint my kid. I found that one out on my own.
This has to be done on their little toes too. Luckily, baby feet are a hell of a lot cuter than the adult variety. A hidden perk - those little feet are usually ticklish, so toe de-linting may lead to your baby's first giggle. Well worth the very strange step in baby maintenance.