If it worked on you, probably it will work again; unlikely you’ll gain another 1” in 1-2 months, but you do know that jelq is a good exercise for your penis. “If it’s working”.you can fill dots, right?
You might be right - what method did you use to get most of your gains?
I had gains both from manuals and hanging; I think manuals are more efficient than hanging and can fit more with normal life. I think one should go on hanging when other techniques aren’t anymore working.