Are you making sure you arent't slowly slipping out of the chamber? Is the sluice ring almost up againts the chamber at all time? It always is at first, but if you wear it with too much tension with a vacuum not strong enough to withstand that tension, the glans is slowly being sucked out of the chamber. Since your glans is inside the chamber, it is not visible and therefore harder to control, unlike the [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]sg[/words]. But if the gap between the sluice and the chamber is increasing lets say every 30. min. You are either using too much [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] or too little vacuum.
That is what happened to me when i started using the [words=https://www.internetzahlung.de/cc-aktuell/bestellung.php3?PID=PM0440A&Sprache=en]pmp[/words] pro, but now i cant live without it