Have two phalaenopsis--one large and one baby, and the single leaf on
the large one fell off recently, and one of three fell off the baby
one.

The leaf that fell off the big one was really soft--kind of like
wilted lettuce when I touche it--that was also when it fell off. The
leaf that fell off the baby looked kind of dry and had a few small
white spots on it. Again, when I touched it, it too fell off.

Why are the leaves falling off? Isn't it a bad thing when leaves fall
off--after all, don't they need it for photosynthesis? What can I do
to prevent that?

Thanks in advance.

Lil