Mold in the Kitchen
Mold can often be found growing in the kitchen because of the high humidity from sources such as boiling water and cooking and also because of the large amount of food around for mold to grow on.
Mold from Humidity in Kitchen
Spills which are left to evaporate, boiling the kettle or cooking increases the humidity in the kitchen. Ventilate the kitchen regularly and clean up spills quickly to decrease the humidity level.
Mold in Kitchen Sink
One place mold is often found is under the kitchen sink. Sometimes moisture can build up here from leaks or from condensation on the pipes. Steam from washing dishes in the sink can also increase the humidity in the rest of the kitchen and any water spilt may provide moisture sources for mold to grow.
The sink's garbage disposal should be run every day and cleaned frequently. You can pour a few cups of vinegar down there once a week to prevent mold and to kill off any existing mold growth.
Mold on Food
Besides many moisture sources there is also a lot of organic material in the kitchen which mold easily grows on. Rotting food such as fruit or vegetables is a prime substance for mold growth.
Moldy food can often be found in the rubbish bin and compost bucket. Given enough time, mold will start to grow on the organic waste in your bin. Ideally you should empty the bin once per day to prevent mold growth. For this reason it's best to use a bin size that is about the same in volume as the rubbish you accumulate during each day.
Likewise for the compost bucket, make sure to empty it out each day and always keep it covered. Also look out for other places with old rotting food such as in the fruit bowl.
One more surface that might accumulate mold growth is the cutting board. Moisture from cutting food as well as small food particles create a perfect area for mold to grow. Using vinegar, wash it off once per week, leaving it for 10 minutes before rinsing.
Mold in Fridge
Food that's left in the fridge for a long time can end up with mold growth. Often food towards the bottom of the fridge that is left out of sight and forgotten about may develop mold, especially since it is usually not as cold towards the bottom of the fridge and more moisture can end up there. Regularly clean out the fridge, checking for any old food left in there such as rotting fruit and vegetables, or old bread.
Another moisture source which can feed mold is the drip tray of the fridge. Frequently check it for mold growth.