When storing Jello in the fridge, it is not absolutely necessary to cover it, but doing so can help maintain its quality and prevent it from absorbing odors from other foods in the refrigerator. Here are some considerations:
Preventing Contamination: While Jello itself is a relatively low-risk food in terms of contamination, covering it can prevent any accidental spills or exposure to other foods in the fridge that might not be as safe to consume if they come into contact with Jello.
Preserving Texture: Covering Jello helps prevent the top layer from drying out, which can alter the texture and appearance. If the Jello is left uncovered for an extended period, it may form a thin, rubbery layer on top.
Reducing Odors: Jello can absorb odors from other strong-smelling foods in the fridge. Covering it can help preserve its original taste and prevent it from picking up unwanted flavors.
If you choose to cover the Jello, you can use plastic wrap, aluminum foil, or a tight-fitting lid on the container. Ensure that the cover is placed gently on the surface of the Jello to avoid disturbing its smooth texture.
However, if you plan to consume the Jello relatively quickly or are not worried about potential odor absorption, leaving it uncovered in the fridge for a short period is unlikely to cause any significant issues.
Ultimately, while covering Jello is a good practice, it's not a strict requirement. The choice to cover it depends on your preference and the specific conditions in your refrigerator.