If you locate mold in the refrigerator, sink, showers, or bathtubs and want to remove it, bleach is one way to do that. If you are allergic to bleach and need a natural alternative consider white vinegar.
You may need to consider wearing rubber gloves/face mask if searching for mold and also while cleaning mold.
Add some full-strength white vinegar to a clean spray bottle. Spray mold with vinegar (enough to fully cover the mold) and allow it some time to sit for awhile (possibly overnight).
After the vinegar has worked its magic, spray more vinegar on the spot and clean it off with a paper towel. If some of the mold will not come off, you may want to repeat this cycle again.
When cleaning mold, I believe using paper towels or disposable rags is best so you can throw the paper towels/rags away away after you finish.
To prevent mold from returning keep the area clean and dry. I keep a spray bottle of vinegar under the kitchen sink to clean with. For normal cleaning in the kitchen I dilute vinegar by 50% so that the spray bottle has 1/2 white vinegar and 1/2 water.