ECF Members; The ECF Troubleshooting Guide has been revised with added tips and was created to help both new and old members find and correct problems which may arrive using your E-Cigs. This is a downloadable file that you can download, and have in your computer for future reference. This is a .PDF file and consists of four (4) pages. It covers factory recommendations, how to use a digital multimeter, troubleshooting information and e-liquid tips and information. Simply click on the link, click on Save" and save it to your computer. The file has been scanned, and is virus free. Good luck, and happy vaping.