Akbees, I do notice some stretching out of the liner over time but never to the point that it looses the squeeze. Probably has something to do with size and firmness of your cock. I use a 2.50 housing and either a 2.25 or 2.38 liner ( I have a couple plus 1 with a stroke sleeve)). I just use ID or Wet. OR you use your VK2 a lot more often than I do….(I average 2 or 3 times a week)…but really long sessions.