It's quite long in sections so I have been able to isolate these sections and spray them with glyphosate but obviously this won't work in the short sections as it will also kill my turf.
Unfortunately, They are both warm season perennials, and as such will be similarly affected by any treatment from selective herbicides. The only reliable method of removal will take out your lawn as well (tarping or herbicide). Once it's dead, you can prevent germination for the most part with a pre em. And if you do see a small clump shoot up, you can take care of it while small.