A -20°C freezer used for storage of DNA typing reagents is at -35°C. What immediate action should be taken?

The ideal storage temperature for DNA typing reagents is typically around -20°C to maintain their integrity and effectiveness. When the temperature drops to -35°C, there is a risk that certain cold-sensitive reagents could be adversely affected. These reagents may not function properly after being exposed to temperatures that are significantly lower than their recommended storage conditions.

Moving the reagents to a backup -20°C freezer ensures that they are stored at the optimal temperature, thus preserving their stability and preventing any potential degradation that could occur at the colder temperature. Additionally, calling for service to address the malfunctioning freezer is a prudent step to avoid future issues, ensuring reliable storage conditions for sensitive materials.

This approach prioritizes the integrity of the reagents and ensures compliance with best practices for reagent storage, emphasizing the importance of maintaining optimal conditions for laboratory materials.