If your ice cubes have been in the freezer for months and have been stored in a clean and sealed container, they are most likely safe to use. Ice, being frozen water, has a very low risk of spoilage or contamination. Freezing helps to inhibit the growth of bacteria and other pathogens, making the ice cubes generally safe to consume.
However, ice cubes can absorb odors from other items in the freezer, so if they have been stored alongside strong-smelling foods, they might have acquired some of those odors. In such cases, the ice cubes could affect the taste of the beverages they are used in.
Here are a few things to consider:
Odor and Taste: If your ice cubes have picked up unwanted odors, they might make your drinks taste off. In this case, it's best to discard them and make a fresh batch of ice cubes.
Freezer Burn: Over an extended period, ice cubes can develop freezer burn, which is the drying out and dehydration of the ice's surface. Freezer-burned ice may have an unpleasant texture and flavor. It's best to discard any ice cubes that show signs of freezer burn.
Cleanliness: Ensure that your freezer and ice cube trays or containers are clean and free from any contamination before making new ice cubes.
Ice Quality: Check the appearance and texture of the ice cubes. If they look and feel normal, they are likely safe to use.
If you have any doubts about the quality or safety of the ice cubes, it's always better to err on the side of caution and make a fresh batch. When in doubt, throw them out.