Before I go to bed I take a 60g egg protein shake. It is so rough/gritty. I tried mixing it with milk, and then with milk and a 20g scoop of 100% whey. It is still horribly gritty. It almost hurts my throat. I even tried dissolving it in super hot water. Do I just gotta deal with it? Are the other slow digesting proteins, such as the cassein blends, gritty as well?