I had bought some kefir grains a while back, and tried to use them regular. I think the problem is that, I seem to have over active grains. If I leave the grains in a quart of milk for 12 hours, it is already starting to separate. 24 hours, and it is pretty much curds and whey, totally separated. In either state, it tends to cause constipation. If I leave it in the fridge in the fresh milk, it takes a day or two to be kefir, and maybe a week before it starts separating. I keep hearing that the grains have to be put out at room temperature for a while so they can eat, but these eat and grow, staying in the fridge all the time. My fridge is about 38-39 degrees, and my house stays about 69-70. Anyone have similar experiences with their grains? If I let it culture on the counter, I am just wasting milk. If I let it work in the fridge, it is good. I have probably a quarter cup of grains, and I use them in a quart of milk.