Cleaning an air filter is an important part of vehicle maintenance. After using kerosene or a specific filter application to clean the filter, it's essential to allow it to dry naturally. This ensures that all contaminants are removed. Depending on the type of air filter and the weather, the drying time can vary from 1.5 hours to a full day.
If you're in a hurry, you can expose the air filter to the sun for a few hours to speed up the process. However, it's best to let it dry for 24 hours if possible. This will allow the oil to become sticky and ensure that the filter is ready for use when you need it. When drying an air filter, be sure to wash it with warm soapy water first.
This will help remove any remaining dirt or debris. Once the filter is completely dry, you can put it in a zip lock bag and store it until you need it.