How can you permanently eliminate a brush?

Another question is: What permanently kills brush?

Vinegar and dish detergent. The vinegar kills your brush while the dish detergent acts as an adhesive. This makes the solution stick to your brush's leaves, which causes it to die more quickly. Mix two cups of apple cider vinegar with four tablespoons liquid dish detergent in a spray bottle.

The next question is: What is the best brush killer for you? Top 5 Best Brush Killers - Comparison Table

This is how to clean my brush.

Clearing Brush

1. 1 Use a Tree Pruner to Cut Woody Brush. You can trim the brush or small trees as close as possible to the ground. As you do this, drag the brush away and place it in a pile.
2. 2 Clear Out Larger Plants.
3. Use a string trimmer to cut tangled underbrush.
4. 4 Clear Cut Debris + Dispose immediately

How can you get rid of woody brush?

1. Mix 25-50 percent of glyphosate herbicide with water.
2. For small trees and woody plants, trim the tree to within 4 to 6 inches of ground. You can use a handsaw to cut the tree, or a chainsaw to chop large trees.
3. Drill several holes of 1/4-1/2-inch to 1/2-inch in diameter right down into the stump.