Lavarse or lava?
This is a general question. Just an example, lavar.
Wash your hands. When do we say, lavarse vs. usted lava los manos? Lave sus manos?
How about I wash my hands.
Lavo mis manos or lavarse mis manos?
Lavarse etc. means I did it to myself or h/s they did it to themselves
Me lavo las manos = I wash my hands, you don't use the possessive adj after reflexive verbs
se lava las manos = h/s washes h/h hands
lavo el coche = I wash the car, not reflexive
This will explain it much better