Irrigating, liming, and fertilizing the areas where it persists will slow down this weed and help prevent germination later on this fall. However, for the unlucky ones that have it cast all over the lawn, I need to warn you. Spraying now will not control this weed. Since it is a winter annual, it is in the process of dying. Spraying is not effective at this time.
Herbicides work best when the weed is actively growing.
In the case of facelis, this would be on a mild day in February or March. If herbicide sprays aren t your thing, you can always use a pre-emergent herbicide in the fall if you want to prevent any of those cottony seeds from germinating this fall. Pre-emergent herbicides in the fall work great, only if you do not have plans of reseeding any bare spots in your lawn. A great way to melt away chances of this weed reappearing next year is to keep your lawn well fertilized and well watered so that it can form a dense enough mat to choke out any facelis weeds from growing. So as your lawn goes dormant, try to find some other things around the yard to do to keep you busy.