Important to correct some misinformation. This is a sieve not a solvent extraction. Therefore anything that dissolves into water is not part of your hash production. No worries on that. The hash is hydrophobic, so the water is not 'mixing' witht he hash, and any hydrophyllic dissolved bits, like sugars or chlorophyl, is irrelevant.
You can get chlorophyl contamination other ways due to aggressively beating up the material -- stirring to aggressively, stiring with a sharp object that tears up the material or even jagged ice -- buy the ice packs with smooth edges etc. You'll have a green tint to the hash if you fck this up, so it's not a guessing game.
again, don't have to dry or cure. Everything that goes into ice hash is from the surface of the plant materisl. It is not dissolving anything - that's why it is called a solventless extraction.
Youtube search terms - "Frenchy hash"
Find the ~2 hour video with him standing in a warehouse with a custum built 'washer' and one of those blue, generic RV mini washers. He goes over every important aspect. Some things are more worthwhile to follow exactly than others, but that will be about your personal prefence. e.g. always fully saturate, don't get creative about that, but how many sieve bags you use is going to be something you have to 'hash out' to find your preference. pun intended.
just in case the family tries to put up a pay wall on this information, I downladed the video a long time ago, but need to re-encode to a smaller file size for the free download sites. i'll post it here later.