Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

In the Name of Allah, the All-Merciful, the Mercy-Giving

  

All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad.

 

Whoever has advised you to do so does not know the Fiqh of hajj or even its basic rules. No scholar or school of jurisprudence in Islam teaches these. Instead,  all of them agree that you are allowed to change one pair of Ihram, for another,  and bathe or shower, or even  apply non-scented crème, brush the teeth, etc.

 

This is what we learn from the precedents and practice of the prophet and his companions. There is a virtual consensus on the permissibility of the above things.

 

So, such a person may do well to stop leading Hajj until he has gained proper knowledge from the trained scholars.

 

Almighty Allah knows best.