He wants to do ghusl asprescribed in sharee‘ah, using shampoo and soap.,Dought & clear, -

Is it permissible to start ghusl by cleaning oneself with soap and the
like, then to do ghuslas prescribed in sharee'ah?.
Praise be to Allaah.
Using shampoo and soapwhen doing ghusl as prescribed in sharee'ah,
such as ghusl in the case of janaabah, is not obligatory; rather it is
sufficient for the Muslim to pur water over his body so that it
reaches every part of it, as we explained in the answer to question
no. 163826 . In the answer to question no. 83172 you will find a
description of complete and acceptableghusl.
If a person wants to use shampoo and soap when doing his obligatory
ghusl, there isnothing wrong with his washing his body with water and
shampoo in order to clean it, then doing ghusl as prescribed in
sharee'ah, with water only. There isnothing wrong either with him
intending to do ghusl for janaabah with the water with which he is
removing the shampoo and soap with which he has cleaned his body, so
thathe makes water reach his whole body only once, combining the
twomatters.
Shaykh 'Abd al-'Azeez ibn Baaz (may Allah havemercy on him) was asked:
I did ghusl for janaabah using soap and shampoo; does this ghusl count
for wudoo' too, if that was my intention?
He replied: That will count for both if you intended both types of
purification. But it is preferable to do wudoo'first, then to do
ghusl, asthe Prophet (blessings and peace of Allah be upon him) did,
because that is more complete. There is nothing wrong with using soap
or shampoo or lotus leaves and the like in order to remove dirt.
End quote from Fataawa ash-Shaykh Ibn Baaz, 10/173