Once the doll's hair is shampooed, set the doll aside for about 10 minutes. This gives the shampoo a chance to soften the hair. This will help remove any tangles and leave the hair soft and shiny. Set the doll aside in a safe place where it's unlikely to be disturbed.

TL;DR in Indonesian:
Diamkan rambut boneka  di dalam mangkuk selama 10 menit.