If you are having a lot of build up, than maybe you are using too much pressure. To get the most out of each jelq you don’t have to augment the force; try doing it slower, instead: you do a 3 secs stroke? Try a 5 secs, and see the difference.
Thanks for the advice, I will try that. It seems I am always trying to do too much at one time. I will slow it down and loosen the grip.