Bermuda lawns are simple if you just do it right. Lots of products have an agent mixed in now that help the chemical stick to the grass which is what the joy does. You should use trimec (2-4D) now, if it ever quits raining, for broadleaf grass. Then, MSMA when it gets above 85 for grassy leaf stuff (crabgrass). Don't spot spray, get the whole yard multiple times if needed. The hotter the better for MSMA. Put red sand on the bald spots, fertilize and watch how fast the Bermuda will climb into those spots! Then, pre emerge in the fall and late winter. Next year, viola, feed and water your beautiful lawn!!!
Pre emerge, pre emerge, pre emerge!!! You won't have hardly any weeds at all come Spring and Summer!!!

Don't buy the crap from home fixer upper stores. Go to the co-op and get the stuff that works!