A lot of these types of problems occur from a lack of sufficient humidity. The humidity in most houses hovers around 50% or less. This is fine for some plants. But for others, which flourish in hot wet humid places, 80% is actually what they want and need. I live in Florida, it is generally very hot and humid here for about 9 1/2 months out of the year but the brief winter we have can be very dry. To compensate for this many people here use foggers, grow in mist houses, or use overhead 'rain' watering systems that completely and throughly wet all surfaces in the growing area in order to maintain humidity and prevent large fluctuations, which can cause damage and desiccation of leaves.
There is a large movement among houseplant growers here in the US (I am not a houseplant grower I am a greenhouse/tropical rainforest set up grower) who want to grow these plants in setting up small mist tents in their houses that they grow their plants in. These are dedicated spaces almost like indoor greenhouses that are used to grow mainly aroids and other finicky plants like calatheas, rare begonias, orchids and the like.
Some people believe that humidity is a non-issue but it has been shown that keeping aroids at a higher level of humidity is extremely beneficial.
