Can you explain in more detail your routine when you had the “most dramatic gains.” What erection percentage were you jelqing at? Did you warm up and warm down, or did you just jelq in the shower? Did you stretch before, during or after you jelqed?
I would use a hot washcloth for 5 minutes then do 5 or 6 one minute stretches. I’d warm up again with the washcloth and then try to jelq at about 80% but maintaining that wasn’t easy. Maintaining a consistent 80% erection level was a balancing act between thinking about work when I was too hard and thinking about sex when I wasn’t hard enough. Some times it would take a minute to get back to the right level and I would factor that lost minute into the total length of my routine.
Actually the 80% figure is an estimate; the way that I would gauge what I thought was a good level was at the beginning of my jelq session I would do a couple of strokes and see if my glans looked like it had the texture of an orange peel. If my head wasn’t engorged enough to get the orange peel look I would try to get it a bit harder and then try to maintain that level just by feel, but never what I would consider a full erection. After a few minutes my glans would smooth out which is why I would look at the texture at the beginning of my session. I kegel at the end of one stroke and grab the base with the other hand before releasing the pressure of the first stroke.
That seemed to work for me. Hope it helps.