there's a technique...its defintly more of an art form....than a technique....if you have a strain that is a confirmed melter...keep trying...go into a walk in freezer(or outside if its freezing) and do a quick rub....lightly.....
Im acctually not sure if this is a full melt strain. I run it through my four bag set and get some bubbley ice hash. I guess I assumed it would also make full melt dry sift. I still have a few more strains in my garden that I'll test out.
Even if you can fit your arms, bubblebox and stuff into your kitchen freezer it would help. Also do a quick sift first and pull the resin and check it. You can also sift more, but you can't really un-sift.