Black spots in the kitchen sink
Since you are allergic to bleach get some hydrogen peroxide. It will kill mold and mildew. I purchase my Hydrogen peroxide at a local chemical supply house and dilute to 3% with water. Remember when using concentrated hydrogen peroxide always add it to the water to dilute. Then spray or wipe down and let it sit for a few minutes and rinse. It may brighten the sink enamel if stained so be prepared to do the entire sink. I learned this sanitizing trick when working for a hospital, no bleach smell and it kills the nastys.