I use the wiesner clamp, I usually forget it’s even on and occasionally I don’t remember to take it off. At the three hour point it starts to hurt a little. I usually set a two hour timer on my phone to remember to take it off.

The documentation for the clamps say that they should only be on for two hours, and if you want to continue, you should move it to a different spot.

It can cause damage to the urethra so you want to be careful. Wearing it as much as you say is not safe Unless you’re moving it around Every couple of hours.