The recipe is: 1 gallon white vinegar (apple vinegar attracts bugs)
2 cups Epsom salt (regular salt doesn't work very well, I've tried it.)
1/4 cup Blue Dawn dish liquid
This is the You Tube address:
This video does show he mowed the weeds on the path down before he killed them and I've found getting the weed down first is an important park of success. So us your Weed eater, clippers or hands to get those buggers down short before you spray them.