I’m aware of a few different ways to make perfectly clear ice, but each has its own tradeoffs.
I’m also aware of a whole bunch of different ways people claim to be able to make clear ice, but I’ve been unable to replicate.
What are you doing? Does it require special equipment? Do you recommend it?
Directional freezing in a dedicated ice cube tray with holes connecting to a water reservoir
There are some products that basically do the same thing as the cooler method, but with a dedicated ice cube tray already cut to size. The idea is that you do the directional freezing in an ice cube tray, and that when the timing is just right, you can pull the whole thing out and just pull the ice cube tray up with formed clear cubes ready to go.
Pros: very easy, nice uniform size and shape with crisp 90° edges.
Cons: gotta get the timing just right, requires buying a dedicated setup for plastic and silicone pieces that aren’t useful for anything else.