By Emma Mackenzie Your sad-looking peace lily might be salvageable yet with one quick house plant hack. When they are at their best, peace lilies are a stunning addition to any home, with their graceful white flowers and dark green leaves that feature a glossy sheen. Not only that, but they have a myriad of other benefits, including that they can help reduce unwanted smells, absorb excess moisture and so accordingly reduce the risk of mildew or mould appearing in your home, and purify the air. These clever multi-tasking plants are a popular choice of houseplant for a reason, but they can somet…