My grandpa taught me this trick to kill driveway weeds with 0 effort. Here’s how it works.

If you mean you want the idea explained in detail: the common “grandpa trick” is usually boiling water.

Pouring freshly boiled water directly onto weeds growing through driveway cracks can kill the plant by rapidly damaging its leaves and roots. It’s especially useful for small weeds because there’s no mixing or spraying involved.

How it works:

1. Boil a kettle or pot of water.
2. Carefully carry it to the driveway.
3. Slowly pour the hot water directly over the weed, concentrating around its base.
4. Let the area dry.
5. Persistent weeds may need another treatment after they regrow.

A couple of cautions: boiling water can also kill nearby grass or other plants, and it can damage some surfaces or cause serious burns, so keep it away from desirable vegetation and handle it carefully. It also isn’t truly “zero effort”—you’ll usually need to repeat it for established weeds.