How do I figure out if my Delvotest® has expired, and how should I store it?

The tests should be stored upright in the original packaging, in the dark at a constant temperature below 8 °C prevented from freezing (preferably between 4 °C and 8 °C). Lower and/or fluctuating temperatures may result in softening of the contents, leading to loosening or liquification of the agar or the formation of air bubbles. Storage at a higher temperature will shorten the shelf life.