What this actually is
Forget the twelve bottles. Under Your Sink is one small set of raw ingredients, plus the know-how to point them at the right mess. That's the whole thing.
The supermarket sells you a separate product for every surface: bathroom spray, kitchen spray, glass spray, toilet gel, on it goes. But dirt doesn't care what room it's in. Grease is grease whether it's on the oven or the shower screen. Once you know that, a handful of ingredients quietly replaces a cupboard full of near-identical sprays.
Nine ingredients. Every room. For life. Let's teach you how.