To use these microscope glass slide covers, simply place them gently on top of the specimen on the microscope slide. Make sure it's centered well for a clear view. When handling, use clean hands or tweezers to avoid smudging. As for storage, keep them in the provided plastic case in a dry and cool place. This will help prevent any damage or dust accumulation. Don't expose them to extreme temperatures as it can affect their quality. If they get dirty, you can gently clean them with a soft, lint - free cloth. And always remember that the item you receive might look a bit different from the picture, but it will still work great for your microscope observations.