Pressing dry ice hash into rosin is extremely efficient, solventless and clean. That’s what I’ve settled on, because I don’t have the patience for much else. If you go through the process of making bubble hash, you can get a better product. But in the end, only you can decide how much expenditure of time and effort is worth it for the increases in quality.
For me, I can turn a whole harvest into dry ice hash in 1 hour, and press it into very clean rosin in another 2. There’s not much of anything leftover when I smoke it, and that’s good enough for me. For the people seeking the ultimate level of rosin purity, there’s always more you can do to improve it.