This plant was raised in a greenhouse. The temperature in that greenhouse was regulated for optimum plant health. Frequency and duration of watering was controlled for optimum plant health. The humidity was kept high for optimum plant health. Air circulation was controlled for optimum plant health.
Then you bought the plant and brought it into your home. Your home environment is optimized for human happiness and enjoyment, not the health of tropical plants. The change that palm has been through is tremendous. Palms react slowly to environment, much slower than many other house plants. I would guess it is showing symptoms from the move from greenhouse to your house.
What to do? More humidity -- I think that would have the biggest impact. You live in a desert and this palm is from the jungle. You can mist or spray the leaves every day, more than once even. You could place a pan of water under or next to the pot -- but not in contact with the soil. Just the evaporation helps. And water something like suggested in the first answer. Lots of water is okay, but soggy soil is not.
With sufficient water this palm should stand lots of light -- but full sun behind glass is like a magnifying glass and will burn most any plant. Change in lighting (like all other changes) should be done slowly days or weeks, not hours.