Bono regularly sniffs salty water as it acts as an antiseptic for his throat and helps ensure he can hit high notes, according to The Script frontman Danny O’Donoghue.

Danny told Britain’s Daily Mirror newspaper: “Snorting salts - it’s actually a singing technique.”

“Myself and Bono share a vocal coach. Whenever the high notes aren’t feeling that high or in the morning you’re groggy, you snort salt water up your nose.”

“It cleans out cavities, it’s a natural antiseptic for your throat.”

 We did not know that