If you notice any of these signs, it's best to err on the side of caution and discard your pineapple salsa: -Foul odor: If you notice a sour, rancid or off-putting smell coming from your salsa, it's a clear sign that it has gone bad and should be thrown away. -Mold: If you see mold growing on the surface of the salsa or around the edges of the container, do not pass Go, do not collect $200. Toss it directly in the compost.  -Discoloration: If the color of the salsa has changed, becoming darker or more opaque, it may be an indication of spoilage. Note that some ingredients like avocado will oxidize and become discolored without going bad, so use your best judgement. -Bubbling or fizzing: If you open the container and notice that the salsa is bubbling or fizzing, this is a sign that some bacteria are hosting a heck of a party and you're not invited. -Taste: If the salsa tastes different from what you're used to or has a funky or off-flavor, it's a good indication that it has passed its prime. Eating spoiled salsa can cause food poisoning and other health problems, so it's always better to be safe than sorry.