Solarizing usually means to heat something high enough to kill weeds and weed seeds.This was going to be my suggestion as well. I believe this is called "solarizing"; we did it to a decently-sized piece of our land to KO various weed, grass, and other plants so we could turn it into a pollinator meadow.
Pray for sunlight and lots of it!
Since that poster would like to keep the grass alive, I am not suggesting solarizing the area.
I am just suggesting to make it a bit warmer, like a greenhouse, to speed up the rate at which AI dies off.