Repotting, light, location problems?

[Katfragoso]

Backstory- I received 5 orchids June 2019 from a deli owner who was going to toss them after they flowered. I took all 5, in moss, cut 3 of the spikes to the leaves and the other 2 were cut just above the last flower. All 5 were soaked/submerged for 5 minutes once a week and we’re in a south/east facing window on the 3rd floor of an NYC building. Immediately, three of them began to grow new spikes and two of them tried to flower (created 2 buds that never opened). I sterility cut all spikes in May 2020. In the following year, all 5 were watered as above. No new leaves developed.
In November 2020, I took them all home. First I placed them in a well lit room but not in direct sun. On Dec 27, I repotted them into Better-Gro orchid potting mix being careful to remove any dead roots. I placed them in a southern facing window and watered them with 2 ice cubes, once a week. They are in a window sill on the 5th floor just above the radiator. I do spray them periodically with water mist.
Anyways, some of them look pretty bad and the air roots are dry. I’m trying to find the best way to help them flourish. Three of them are making new leaves but the older leaves are all shriveled. A few have try tips and a few leaves have turned black around the edges.
Below are pictures of what the 4 I’m concerned about look like now.
Any help is appreciated

[Ray]

Forget the ice cubes.

With that (apparently) coarse of a potting medium, I recommend that you take each plant individually to the sink and run large volumes of tepid water though the medium, so that it is well saturated.

The idea behind "ice cube" watering is to slowly moisten the densely-packed sphagnum moss they are often potted in at the nursery. That technique reduces the chance of the moss becoming saturated and suffocating the roots. In fresh bark-based media, that's unlikely to happen and 2 ice cubes a week is entirely too little water.

[SouthPark]

Totally agree. Abandon the ice cube watering. When enough ice cubes are added to provide adequate water to the media ----- that could chill some regions of the media in regions near the plant ------ so the plant probably needs to end up surviving that extra hurdle among other ones.

The above relates to regular growing conditions ------ not somebody being there all the time to keep feeding a couple of ice cubes to media (such as sphagnum) that's pre-primed with water. But as we know - people do need take a break - and go on holidays - and also forget to water. So the ice cube idea is a 'fail' ------ as we might as well get an electronic automatic water spray dispenser to do the job properly ------ or just do regular manual-controlled watering.

[Katfragoso]

Ok sorry. I forgot to mention I abandoned the ice cube thing last weak and went back to soaking for 5 min each. I use filtered water (Berkey) In the soak because I live in an old building with old pipes that actually was making my other plants not do so well

The leaves are normal looking like that at the tips? I guess so since they are growing new leaves?

[estación seca]

Welcome to the Orchid Board!

They're not getting enough water. The leaves are wrinkled and not shiny. In bark that size you could water almost every day and it wouldn't be too much. People warn about watering these too much, but if there's plenty of air at the roots, they can stay moist.

The brown tip also might be from touching cold window glass on a cold night. Plants can freeze that way.

Tap water is fine for hybrid Phalaenopsis like these, especially NYC tap water, which is quite pure. Bottled water won't help. Pipes don't alter water quality very much. Your other plants probably have a different problem than water quality.