2 cups Distilled White Vinegar
½ cup Hydrogen Peroxide
1 cup water
Use this cleaner for things like tile grout, or low contamination areas
For full strength omit the water (areas like the kitchen counters, bathroom sinks, doorknobs, etc.)
For scrubbing tubs or kitchen sinks sprinkle baking soda on the area and then spray with vinegar/peroxide. Let fizz and then scrub clean.
Table salt can also be added to the above for extra scrubbing power.