Yes, glace cherries do go bad, as indicated by their specified shelf life and the presence of a "Use by date".
While preserved with sugar, glace cherries are not immune to spoilage over time. They have a defined period during which they maintain their best quality and safety.
According to the provided reference on Candied and Glace Fruit:
- Shelf Life: Glace cherries typically have a shelf life of 18-24 months.
- Use by Date: A "Use by date" is usually located on the outside edge of the lid, often found under the tamper-evident tape.
The existence of a set shelf life and a "Use by date" confirms that the product is not designed to last indefinitely and will eventually deteriorate in quality, texture, flavor, or potentially become unsafe to consume after this period.
Even with preservation, factors like exposure to air, moisture, and temperature fluctuations can affect the quality over time. Sticking to the "Use by date" and recommended shelf life ensures you enjoy glace cherries at their best.