[header] How to keep car windows fog free using a potato [title] Cut a raw potato in half. [step] Be sure to use a clean potato, so wash it first if it is coated in soil. This is a good opportunity to use up an old potato that has started to sprout and is past its best. 
[substeps] You can also use up the potatoes going green. [title] Rub the cut side of one half potato on the window.