This might be a little off topic, but I'm new here too and can't say I know much about "weed control." I do, however, have some experience with "dirt and pet control!" My wife and I got a Roomba for a housewarming gift a few years ago and it has worked great for picking up pet hair and tracked in dirt! We just set it loose after we've been in and out of the house for a few hours, and, problem solved!
Just a little something to drive you less crazy until you can figure out how to get rid of your pesky weeds!