firebutton

Hey guys, I picked up the latest VS Vaporflask on sale recently, and love the feel and design of it. But the fire button is crap. It spins really easily. Which normally wouldn't bother me, but because of the curved shape of the device, it gets stuck in firing position, and will not stop...

Does anyone have this mod? If so have you noticed that sometimes you have to press really hard to get it to fire. The longer I have had this the less responsive the fire button is getting. Any help would be much appreciated! Sometimes it just doesn't fire at all or it takes a long time to fire.