How can I purify cheap alcohol such as vodka?
Grab a container to hold the alcohol, and place a coffee filter on top of it. Pour the alcohol through a funnel onto the filter, and let the alcohol drain into the container. Replace the collected alcohol into the bottle, and store properly.
Using a pot, heat up the alcohol to boiling point, and collect the condensation into a separate container. Clean the pot of any impurities, and place the purified alcohol back into its original container or bottle using a funnel.