You'll need a spray bottle, some canning vinegar, table salt and dish soap.
Warm two cups of vinegar in the microwave for about a minute - you're using canning vinegar because it has a higher acid content than regular white vinegar.
Stir a half a cup of salt into the vinegar until it's dissolved. then add a squirt of dish soap to the mixture and pour it all into your spray bottle.
Now, take it out and saturate the weeds. You want to spray enough that you see the entire area around the weeds soaked.
Now let it sit for about an hour. The ingredients will work together to shrivel and loosen those weeds.
When the hour has passed you will be able to see that the weeds have shriveled up, use a push broom to easily remove them from the walkway!
That's all there is to it - natural weed control right from the kitchen. Try it for yourself, I'm Mrs. Fixit and it's just that simple.