leaves that don't open

[monna lisa]

When I mist, I always try to wait for roots to get from white to green, in order to be sure they are filled with water. But maybe it's not enough...
I add fertilizer only once a week, otherwise I'm using R.o. water. I'll try to soak them once a week and see.

Here's a pic of my orchid case:



And two examples of what I meant for "reddish tinge"...leaves are simply slightly red spotted, but there aren't any sign of sunbuns.Sorry if Copper sulphate treatement covers all things.