I have a medium sized peace lily at home and it is wilting down fairly bad about every two days...i water it and it springs back every time...why is it wilting down so often? I have another about the same size but i only have to water it maby once a week. they are in the same general area and are getting the same care? whats up with that?

Keep it well misted and in cool temperatures.

Check the pots. Are they the same or different? One pot may do better at holding water than the other.

It needs sunlight, but heat hurts it so be careful that it stays both lit and cool - a warm window sill can be bad.

Switching the two plants' locations should tell you if the problem is location or biology.

Use Miracle grow liquid fertilizer in your mist water. Also a miracle grow fertiziler stick work well too.