Article: One of the most common sources of problems when growing peace lilies is an improper watering regimen. Under-watering and over-watering can cause a variety of non-specific symptoms that sometimes overlap with other peace lily ailments. However, since improper watering is also one of the easiest problems to fix, try attempting these remedies first before moving on to a more drastic solution.  Under-watering should be fairly obvious: dry soil accompanied with wilting, yellowing leaves and a drooping stalk is a dead giveaway. Fix this by watering and misting more regularly - at least once a week for each. Note that plants that outgrow their containers will have a difficult time absorbing the water they need from a typical watering session. Over-watering can be slightly harder to diagnose, but is often characterized by brown leaf tips. Note that over-watering can lead to root rot, a separate, much more serious condition. Root rot is serious condition that can affect any potted plant with roots below the surface and can easily kill the plant. Generally, root rot is caused when a plant suffers from over-watering or poor drainage. If the roots are held in contact with standing water for a prolonged period of time, it becomes difficult for them to get the air that they need to function correctly, and as a result they will literally begin to rot. Certain types of microorganisms called water moulds contribute to the spreading rot, the spores of which can spread root rot to another plant if adequate moisture is present. Root rot is often fatal, but, to attempt to remedy it, immediately remove your lily from its pot and cut off any dead, slimy, or otherwise rotten portions of root. Pot the plant in a new pot with dry soil and proper drainage.  Though root rot infects the plant below the surface, it will cause the plant to visibly begin to die above ground. If your lily seems to become increasingly wilted even with proper sun and frequent watering, root rot is likely the culprit. Peace lilies are sometimes susceptible to infection by aphids, mites, or other small arthropods. If you notice your lily's leaves begin to wilt or die, especially if accompanied by visible pests, a sticky, slimy discharge, or the presence of white webbing, it's likely that your plant has a pest infestation. Use a strong stream of water to blast the pests off of the plant, then, to make sure they don't return, use a plant-safe insecticide or this homemade recipe for insecticidal soap: Combine 1 Tbsp. (15 ml) vegetable oil, 3 Tbsp (16 g) cayenne pepper, and 1 Tbsp. (12 g) natural fat-derived soap (not liquid dish soap) in 1 quart (.95 liters) of warm water. Use a spray bottle to give your plant a thorough coating, but not  before testing on a small part of  the plant and leaving the soap in place for a day to ensure it doesn't cause any damage. Fungus infections can range from harmless to potentially fatal. If you see a white or grey fuzzy growth on the surface of the soil, you don't need to be terribly concerned, as this fungus is not a danger to the plant (though it can irritate some humans, especially those susceptible to allergies). To clear this minor fungal growth, you may want to try sprinkling cinnamon (which has anti-fungal properties) on the  fungus. However, if the lily itself develops a dark or black coating on its stalk or leaves for no other apparent reason (frost damage, etc.), your plant likely has a serious fungal infection. Discarding the entire plant is always a viable option in this case, as fungal spores can be very persistent, remaining in the soil and surrounding area for a significant amount of time, where they can re-infect other plants. However, if you'd like to try to save the plant, carefully remove all the affected areas of the plant and discard them somewhere that they'll pose no danger. (like your garbage). Next, water the plant with compost tea, a natural fungicide, to attempt to kill spores that remain in the soil.
What is a summary of what this article is about?
Recognize the signs of  under-watering and over-watering. Repot a plant with root rot. Use insecticidal soap to remove pests like aphids or mites. Clean or dispose of a fungus-infected plant.