to wash yourself
You have to wash your hands.
Lavarte te pondrá de buen humor, así que no me pegues más.
Taking a shower will put you in a good mood, so stop hitting me.
— Tigre y dragón (2000)
Don't forget to wash your hands.
Muy bien, aprendiste a lavarte detrás de las orejas.
Very good, you learned how to wash behind your ears.
— Una segunda madre (2015)