Dr Suporn's most simple instruction was: if it gets harder, dilate more often, if it is easier, you can go easier. I was dilating 2 times a day for six months, never three times. I went off the largest size for a few months when it got really hard, in months 2, 3 and 4, only using the small and the medium to full depth, and didn't touch the big one at all. Then, around six or seven months on, I tried the big one, and after only three or four sessions, got that one going again. Now ten months in, I only dilate once every few days, and have no issues.