Be careful with this!
The late grand mufti of the Kingdom of Saudi Arabia, Sheikh Ibn Baz (Rahimahullah) was asked: Do we say Bismillah when pouring boiled water in the sink or floor? He replied: Yes it's very necessary to say Bismillah when about to pour a hot water in the sink. Because there are always Jinns in these areas too. And Sheikh added: "And i happened to be present at a home where ruqya was taking place, and the Shaikh asked the Jinn why are you disturbing this innocent man? The jinn replied: he poured a hot water on my little children and killed one. The sheikh replied: but you know he didn't see, because we can't visibly see you. The jinn said : why didn't he mentioned Allah's name "Bismillah" the child would have been aware and move. This clearly means, whenever we mention the name of Allah it serves like a signal, it make them aware and move by it. Make sure you always say "Bismillah".