Most of mine ARE my babies since ~ 60 % of what I have was grown from seed or cuttings. Even if I "adopt" them from somewhere else, they are thereafter "my" babies.
@Cinta - sounds to me like you are doing most everything right. But if YOU are concerned with under watering, maybe that is the problem. I keep mine inside year round in my kitchen. They are watered/fed ~ every 10 days. I use see thru clear pots (many are inside some type container) so I can always look at the roots at each watering.
Leaves starting to die is often a sign of rot in Phals. In that case, one leaf falls off, then another, etc. Not always - sometimes they will drop lower leaves but make a new one above.
What kind of light and where placed - indoors and out?
Note that about every 6 months, rather than watering with fertilizer, I water them with Physan or Consan. This kills a lot of bad things.
Basically my watering is what is referred to as weekly-weakly, though I usually go with 10 days - not 7. I typically weaken the fertilizer by 1/2 (weakly) except when they start throwing a blooming stem. Then I go with blooming fertilizer at 100 % strength. Right now of 12 Phals I have 7 or so blooming stems showing. One is coming from a keiki whose mother is also throwing a bloom stem. Yes - I will take a pic. This is usually the time of year mine start throwing bloom stems.
