So, how do you know if your salsa has gone bad? Well, for starters, check the expiration date on the jar. If it's past that, it's probably not worth eating. You should also look for any visible signs of mold or yeast, like a fuzzy texture or bubbles in the sauce.
And then there's the smell test - if it smells sour or vinegary, it's probably gone bad. Unless, of course, it's supposed to smell that way, in which case, congratulations, you've got yourself a stinky salsa!
can salsa go bad? - Test Food Kitchen
Now, I know some of you are thinking, "But I've had this salsa for months, and it's still fine!". Well, let me tell you, that's just playing with fire. Or, rather, playing with bacteria. Don't say I didn't warn you!