Why are the tips of your ponytail palm turning brown?

"Yellow or brown leaves are a clear sign your ponytail palm is getting too much water, since the tree's normal leaf color is light green. Ponytails originate in the Mexican desert. Their native climate is dry with very low humidity. This means they can easily survive winter months in homes with heating systems that dry out the air. When this palm's leaves turn yellow or brown, wait several days before watering your palm again. Consider purchasing an inexpensive meter to gauge soil moisture levels if this problem reoccurs."