@Cupcake15 - I agree and I think that children's personal hygiene should be worked into a schedule so that they can automatically develop these habits without even realizing it.
For example, they should brush their teeth in the morning and before bed, and should shower before dinner. With these habits alone children will learn to get used to excellent personal hygiene habits and will feel odd if one day they forget to take a bath or brush their teeth.
Also, they should have a laundry basket in their room so that they can place their dirty clothes in the hamper and not back in their drawers or worse on their bodies. These personal hygiene tips only take a few weeks to develop and this way your children will never develop poor personal hygiene.