I received my kefir grains recently. What don't you meat they don't agree with you ? Are they not producing kefir or your feel they are not good for your body ? My kefir grains started to make kefir with raw milk from day one.
When I first drank it about half a glass, I had feeling of dizziness/drunkness. It happened with 2 times and after that, kefir didn't bother me anymore but started to make me feel better!