What you need:
A clean spray bottle
Lemon, cinnamon, and tea tree essential oils
Fill the spray bottle half full with vinegar. Add water until you have about 1 inch remaining at the top. Add 10 drops each of lemon, cinnamon, and tea tree oil. Shake before each use.
It's super easy, cleans great, and really cheap. The essential oils seem a little costly at first glance, but keep in mind you're only using 10 drops per bottle and a bottle of cleaning spray last me a good while.