I notice you mention bottles and cans. Do you notice if this is also true for the salsas in the refrigerator section? When I buy salsa, that’s what I get, and they don’t seem to mold any faster than an opened tomato product, which in my house can be within a week or ten days.
OTOH, the place we usually get tacos from includes little table spoon size plastic cups of a blended salsa, and if I leave it out overnight the top puffs out and even explodes! It seems to ferment quickly, but I don’t see mold.
