cymbidium noid new growth rot?

[OrchidTear]

hello, i got this cymbidium noid from meijer a few months back. about a month after i had it i decided to try semi-hydro on it. im sure i shocked it and maybe thats why the tips of the leaves are dying. but my question is. after i changed it to semi-hydro, it started growing a new growth. but today i noticed the growths newer leaves rotted at the base, inside the growth. this is the 3rd orchid thats done this to me recently. im still new to growing them and am confused as to whats going on. when i water i make sure not to get water on the leaves and specialy not in the new growths. so i dont understand whats happening. any advice would be appreciated :3