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. 

how to prep grains for cooking
toast them in a dry skillet

How to reuse an ink pen if the ink runs out?
Refill the ink in the pen's catridge.

how to clean a sink aerator

Find out if you need to clean the aerator, replace the aerator, or clean some other part. Plug the drain with something so that the small parts don't fall out. if you have a pull out head, pull out the spray/water filter part and unscrew the hose from the head.Give it a counter-clockwise twist, making sure you are holding the head and pliers with a tight grip.    Get the small parts out as best as possible.Reassemble all the parts