I have a problem with crabgrass this year in my bluegrass lawn. I missed the pre emerg window and now I have some pretty good crabgrass spots (not lazy but away in school). I was thinking about getting some Drive 75 and some spreader sticker (friend told me about it) but I don't really know how to mix it or what would be the best way to spray it. I have about 10K feet to cover. Any thoughts or ideas? Thanks, J.