Can a 2 year old can of spaghetti sauce that been open be bad?

It's highly likely that a 2-year-old open can of spaghetti sauce is bad. Here's why:

* Spoilage: Once opened, the sauce is exposed to air and bacteria. This can lead to spoilage, even if it's stored in the refrigerator.

* Smell and Texture: A spoiled sauce will likely have an off-putting smell and a change in texture, often becoming slimy or moldy.

* Safety: Eating spoiled food can cause food poisoning, leading to nausea, vomiting, and diarrhea.

It's best to err on the side of caution and discard any open spaghetti sauce that's older than a few weeks.

Here are some tips for storing spaghetti sauce:

* Refrigerate immediately after opening.

* Store in an airtight container.

* Use within 3-5 days.

* Check the sauce for any signs of spoilage before using.

If you're unsure about the safety of your sauce, it's always best to throw it out. It's not worth the risk of getting sick!