Tenacity does it work? No it doesn't! Save your money, you've been warned. 

.You need to use much more surfactant than that, you gotta pour some into that sprayer, that may be your problem because using not enough makes you waste your time here, the tenacity will just roll right off the weeds and into the dirt. You're also doubling up and over spraying rhe same spots, you gotta get a sweeping motion going on😮