Hi
I have many plants at my workplace, I think they benefit from the lighting, which is typically brighter than in a home, and is on for about 14 hours for 4 days, and shorter for the other three, but there are windows and skylights as well.
Do you think your lighting compares to this?
I'll make a guess that your plants are kept a little wetter than needed. Plants use less water in lower light places with almost no air movement. At my workplace, I water once a week at best. Most of my plants are happy. Peace lilies get too dry at that rate.
They may be in a dish or cache pot. Use caution, allow only a little overflow, don't leave them in a pool thinking they will just use as needed.
There may be other problems if they've been in the same pots for years.
