It works like this: Spray three Poo-Pourri spritzes into the toilet before you settle down. That creates a film over the water, trapping bad smells inside. When your bricks splash down onto it, the film releases Poo-Pourri's essential oils, leaving a light floral scent.

Does Poo-Pourri actually work?

My verdict, after a week: Yes, it does mostly work, although whether it works because of the advertised barrier of essential oils or just because the blast of citrusy smell from the stuff is so concentrated that it simply overpowers any other smell is (if you'll excuse the pun) up in the air.

What is the science behind Poo-Pourri?

It uses a proprietary blend of essential oils and other natural compounds, which work by forming a protective film on the surface of the toilet bowl water, trapping odours below after you complete your business and 'file the paperwork', as their tongue-in-cheek advertisements tell us.