If you're paranoid about chemicals (many OCDers are), white vinegar is an ideal alternative. It kills 99% of bacterias, 82% of molds and more than 80% of viruses. You can use it with tea tree oil, hydrogen peroxide, or baking soda to increase its antibacterial effectiveness. However, hydrogen peroxide and vinegar should be applied separately, not mixed together. Also, don't use vinegar in your microwave or oven — your kitchen will smell like vinegar for days when using those appliances. And never mix bleach with vinegar in hopes of amplifying the cleaning power — it creates a dangerous chemical reaction.