instruction:
In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
question:
How do I prepare tomatoes for use as a hamburger topping
answer:
Thinly slice the tomato with a sharp knife


question:
how to naturally soften your clothes
answer:
Add 1/2 cup of white distilled vinegar to your rinse cycle


question:
Stop a key from sticking in a lock, or from being difficult to put into a lock.
answer:

Use a paper towel and apply some oil to the key.  Wipe the key almost clean, a small amount of oil will be left behind allowing the key to slide in and out easily.