Using your knife, cut your banana into tiny pieces to expose more of the cells.
Place your banana pieces in the blender, add a teaspoon of salt and slightly cover the mixture with warm water. The salt will help the DNA stay together during the mashing process.
Mix in the blender for 5 to 10 seconds making sure the mixture is not too runny.
Pour the mixture into the glass jar through the strainer. You want the jar to be about half full.
Add about 2 teaspoons of liquid soap and gently stir the mixture. You should try not to create bubbles when stirring. The soap helps to break down cell membranes to release the DNA.
Carefully pour very cold rubbing alcohol down the side of the