If yours look beyond help however, try these tips to revive it and ensure it comes back to thrive anew.
Drooping crunchy leaves means you're simply not watering it enough. Immerse in a bucket or sink filled with water and soak overnight or until leaves stand tall again. Allow to drain and continue to keep the potting mix moist with regular watering, but don’t over water as they’re prone to root rot. Better to administer the occasional good soaking and let it dry out in between.
Less water is needed in the cooler months.
Yellow leaves indicate it's receiving too much light – remove to an area away from direct sunlight or with dappled light.
Your peace lily also loves a good misting, particularly in summer, to keep the leaves fresh and a wipe to remove any dust build up.
Feed occasionally with a slow release fertiliser or more often with a liquid one, to encourage healthy growth and a burst of lovely white spathe-like flowers in spring.