Your $14.00 will go a long way. Once you add 30 ounces of water, your cost is really only about 50 cents per ounce. We recommend dropping your used cotton coil into a separate one ounce container to clean and restore it. Keep using the same ounce of CN until it loses its power. If you clean 10 $3.00 coils using one ounce of CN, then you’ve saved $30. Do that 30 times and you’ve saved $900 on a $14.00 purchase. Are you smiling yet?