Best way to wear traction device without slipping??

[this_day]

Hey guys, I have been trying to wear a traction device for a few weeks now and I can't seem to wear it anymore than 30 minutes without my glans slipping out of the device.  It's funny because years ago I wore this device for 4hrs+ every day without any problems, and now I can't seem to get past 30 minutes.  

The device I have looks similar to this:
http://www.penistractionextenders.com/images/new-penis-extender.jpg

Any suggestions on how to keep from slipping?

[melting]

Get a velcro strap and strap it through the slits or over the head piece.

Hair ties can also help.

I wrap some plain cloth around my glans. snuggly but not too constricting.

[this_day]

I'll have to try that, thanks melting