Limp Leaves on Phals

[SW18]

I've been browsing the forum for a while and just getting around to creating an account. This is going to be a lot of information, just want to get out all the details to try to figure out what's going on, my apologies in advance.

I purchased my first mini phalaenopsis orchids from a grocery store nearly 3 years ago. When I bought them I had done no research but quickly read up on the basics. Over the last 3 years I've slowly made it up to 13 minis and about 8 larger phals. Originally, I repotted all the minis in sphagnum moss in terracotta or orchid specific pots.

One of the many complications is that I am a college student so my plants have to travel between home and school with me. This also means I have to sacrifice the larger plants and leave them at home, with my lovely mother who despite her best efforts can't keep a single plant alive, since I don't have space in my dorm room. At home all of my plants(orchids, succulents, and house plants) struggle because I have windows that barely get any light and when I'm not there my mom tends to forget to water them. At school in the past my minis thrived and grew wonderfully.

In January, when I was given all of my larger orchids, I repotted everyone in the Better-Gro Special Orchid and Planaenopsis Orchid potting mixes. I repotted because I could see some signs of root rot on a couple plants and I was just generally concerned since I kept coming across sources that said sphagnum moss really wasn't the best thing for them. Many of my plants had severe root rot so I ended up cutting away quite a few roots.

Since coming back to school I've struggled with wilted and leathery leaves on nearly all of my minis. At first I was just running under the faucet about 1x a week, as I had done with the moss. But I found that the bark mix wasn't absorbing as much water and the plants were drying out more quickly. I began soaking in water roughly 1x a week instead and at first they seemed happier. So I started watering more on demand and there have been no changes.

I've had very limited leaf growth so far this year and minimal root growth. At most my oldest plants have only rebloomed 1x since I got them nearly 3 years ago. When they're not blooming I fertilize with Miracle-Gro Ready-To-Use Orchid Plant Food Mist about 1x a month. The window they are in is also a SE facing window, and I can't move them because I'm in a dorm.

I'm just looking for advice on how to keep them happier because I'd really like to not lose anyone else. And best case, I'd love for them to bloom again! I'll post photos of my set up at school and some individual pictures.

Thank you for reading this all and thank you for your advice and suggestions in advance!