Work smarter, not harder

You need to replace that string with a cord of rope. Doesn't have to big and you can buy it real cheap if you only buy 50ft worth. Also a chef's knife would be better it's more pointy shaped. Next time you have steak stab it or rub it a few times with the knife before you cook it. Let it dry and it will look like you've used it for more nefarious purposes.