I think it depends on the effect you want with the grass, with a powerful homebrewed (fly-swat/cattle prod) device you can get each strand of static grass standing to attention in a very regular fashion. I suspect even more so if you invest an a proper contraption.
However, if you are content for your grass to be a little more haphazard, with some bits sticking up, some sideways, and some still sat sideways:
a bit like real grass blown by the wind with mulch and dead grass lying in amongst it;
a party balloon worth at most a penny or two will suffice. Simply sprinkle the grass onto a bed of fairly dilute pva. Inflate a balloon, rub it repeatedly on the carpet or wooly jumper for just a few seconds, then wave it over the bed of grass. You need to get close. There will be a noise like rain on a tin roof as some of the bits of grass are torn from the glue and stick to the balloon, but a good number of them will do the trick and stand up. You will get a thin covering of grass strands on the balloon itself, and these are hard to reliably harvest back into the packet, so this might be a part of the method that is wasteful.
It does work more effectively with quite long strands of static grass, the shorter cut variety maybe needs more of an attractive force.
I will try to get a closeup pic to show the effect, not the full 'static grass' experience, but maybe perfect for a number of scenic applications.