they clean
Los gatos se limpian.
Cats clean themselves.
Las jirafas se limpian las orejas con su propia lengua.
Giraffes clean their ears with their own tongues.
Las chaquetas se limpian en seco.
The jackets are dry cleaned.
Vi cómo los alumnos limpian su aula después del curso.
I saw how the students cleaned their classroom after the course.