This killed all my weeds in my sidewalk

DIY 3 Ingredient Weed Killer
Ingredients
1 gallon white vinegar
2 cups epsom salt or table salt
¼ cup dawn dishwashing soap
Instructions
Pour the vinegar, dishsoap, and epsom salt into a spray bottle. Shake up until combined.
Let settle for 2 minutes then spray the weeds! Make sure you soak the entire weed with the formula.
Let sit for a day then come back and see them dead!
Notes
NOTE: Make sure you spray in the afternoon when the weeds are not damp from dew.