It's a little hard but you can pour some IPA in the jar and make changa with what you can't scrape up. I'm not sure if it really matters but it does seem like the xtals would be able to clump together more easily in a jar.
If your mix was the right consistency I don't think it should have absorbed any, you most likely lost it due to evap in the freezer without a lid.
'Little spider weaves a wispy web, stumblin' through the woods it catches to my head. She crawls behind my ear and whispers secrets. Dragonfly whiz by and sings now teach it.'