Using the Hollowick Liquid Tealight Fuel Cell is super easy. First, make sure your Hollowick lamp is clean and dry. Then, insert the fuel cell into the lamp according to the lamp's design. Once it's in place, you can light it up. You'll enjoy a nice, clean, odor - free and smoke - free candlelight. When the fuel cell is empty, simply remove it and replace it with a new one. There's no need to do any other maintenance or adjustments. As for storage, there are no special restrictions, but it's best to keep them in a cool and dry place. Remember, these fuel cells are made in the USA and are designed to provide a true burn time, so you can rely on them to create a great atmosphere in your spa or other areas.