Chances are that you’ve got a bottle of hydrogen peroxide under your sink. After all, it’s a common household staple. And even if you don’t, there’s nothing stopping you going out and picking up some H2O2, as in addition to being extremely versatile, it’s also super cheap. But why is hydrogen peroxide so useful? Well, its oxidizing properties make it a perfect cleaning agent, meaning you can use it for all manner of tough stains and smells – not to mention much more besides.