When I completed my 3rd successful flush I waited about 8 months until attempting my fourth flush. During the break I was eating meat and large quantities of butter and cheese. Upon the fourth flush I released only a few tiny stones, which I considered a failure. In preparing for my 5th flush I returned to a vegetarian diet and it was successful. Then upon my 6th and 7th it was very successful.
Try again, as the break may have interrupted the cleansing process.