As far the question of how to perform Ghusl is concerned, the proper protocol as described by the Jurists is as follows: A person should have the intention to perform Ghusl, then he should clean his mouth and nose and finally start pouring water on his body in a way that not a single part of his/her body is dry. Please note that if a lady has to perform Ghusl and she has long and congested hairs, she does not need to make the water reach every part of the hairs. It is enough if she manages to make the water reach the roots of the hairs. Please also note that it is the sunnah of the ghusl that one should pour water on his body thrice and make Wudu before starting with the Ghusl.