Americans put great value on both grooming and personal hygiene. For some people, taking care of themselves has become almost a religion. As the old saying goes, "Cleanliness is next to godliness."
Whether or not being clean and well-groomed brings one closer to God, it certainly brings one closer to others. Americans look down on people who don't take care of themselves, or who "let themselves go." To Americans, even if we don't have much to work with, we have to make the best of what we've got.
There used to be an old joke in America that people should take a bath once a week, whether they need one or not. In fact, though, Americans generally take a bath-or more commonly, a shower-every day. But in contrast to some cultures, most Americans get their shower in the morning, so they can start the day fresh.