Penilemaster Pro Difficulty

I’m having a very difficult time using this device. For months I was able to use it by not using the rubber liner in the bulb part, but that suddenly has stopped being effective and I’m slipping out with 5 minutes maximum.

I switched to the “proper way” now with the rubber and everything. I’ve ensured I am doing everything correctly (the best I can) because models and parts seem to have changed a little since the tutorial videos creation. I slip out before I can even attach the stretcher. I never even feel like my penis is more than loosely in the bulb when using the rubber lining. And the suction feels minimal at best. I’m waiting the 2 minutes, even 5, and just nothing.

I genuinely don’t understand how people are supposedly wearing a belt with this device and I literally can’t even attach it at all. Has anyone had any luck with this?