I will have to try the handblender trick, although I'm a little afraid of splattering grounds all over the place. What I've been doing is using my teapot and just leaving the grounds in the pot. I add more the next day and keep the old ones in. This morning I just make the bru with all leftover grounds. It was fairly weak so I poured it into the french press with some coffee and made a combo of weak crio bru and french press coffee. Nothing really special about it but at least I felt like I got as much as I could out of the crio bru. But next time I'm blenderizing it.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.