I second all of Melissa’s advice. Finding the right lubricant, and getting completely comfortable with the previous dilator is really important! Not too long ago I was struggling with the same thing. Weeks went by and I couldn’t get the 3rd dilator in. I felt defeated and like I wouldn’t make any progress. But just recently I used a vibrator during my dilation session and it relaxed my muscles enough that I was finally able to get the tip in without it just sitting at the entrance. If you would feel comfortable purchasing something similar I would highly recommend. I was grinning ear to ear when I finally made this progress.