Homemade instruction to get rid of aphids on Pomegranate tree

Have you ever noticed aphids on leaves, fruit and branch of pomegranate tree in your yard? Don't you know how to get rid of them?
If you are not sure what poison to use to get rid of aphids in your yard or having a young child being worried to be poisoned by effects of using unknown poison (perhaps touching fallen leaves on yard), you should follow this simple steps.

Here is all you need:
2 litters pure water
0.5 cup hand-washing liquid/ dish-washing liquid
1 Spay bottle

Instruction:
Mix hand-washing/ dish-washing liquid with among of water. Then spray it on leaves of tree.
Just after 2 minutes you will see the results. No more bugs...
It would not hurt your tree nor other plants. It would not hurt you even if you or your young child touch the leaves or branch of tree.

Cheers!!!