Each of us has encountered a tightly tied package on our path.
Luckily, there is one method that will help you deal with the knot without spending a lot of time and effort.
To get to the contents of the bag, hold the knot with your left hand and twist the free end of the bag into a tight bundle with your right hand.
Push the resulting tourniquet to the left, and the knot will soon come undone.
Let's be honest, this method doesn't always work.
However, the method works for most cases when you need to deal with a knot on a bag made of durable plastic.
If you are about to fight with a thin cellophane bag, you need to use a toothpick or a wooden skewer.
Stretch the knot with a tool at hand and you're done.