The easiest way to tell if your weed gummies have gone bad is to check for any changes in their texture, taste, or appearance. If your gummies have become hard, stale, or discolored, it may be a sign that they have gone bad. Additionally, if your gummies have a strange or sour taste, it's best to avoid consuming them. It's important to always check the expiration date on the packaging and to store your gummies properly to ensure they last as long as possible.