Too much humidity??!!

[SavanaKitty]

I have to mention this is my very first post

So I bought 3 phals. So far they seem to look good, in fact, some of them continue to bloom (the buds are exploding slowly, non of them have dropped after bringing the plants home).

However, I was getting concerned about the humidity balance. It is said you have to pay attention to the bottom of the pot in order to indicate the moist level of the roots. Guess what? It's been 15 days and half of the pot (starting from the bottom) still contains quite green roots.. I can actually see the humidity steam on the inner-walls of the plastic pot that never goes away. However after half a month I still decided to give them a short bath, because the upper roots were fully grey and I suppose getting really thirsty. I am not putting the plastic pots into any other decorative non-transparent pots yet, mainly because I prefer to observe the roots every time I look at it, I'm still learning..

The pots are on the windowsill facing East-North, RIGHT ABOVE THE HEATER, which gives quite a temperature (25*C or even more) and suppose to dry the air out. Outdoor humidity level is around 90% (not sure if this has an indication for indoor plants though)

Can this be a sign of lack of air circulation in the pot? What are your advices? p.s. the roots never go brown, but I'm scared they might..

Thank you for your answers in advance!!!