Microwaves are often well-worn. Spills and splatters dot their ceilings; splattered food stuffs line their walls.

To clean your microwave, you can use the harsh chemicals on sale at supermarkets and hardware stores, or you can apply an all-natural approach which yields the same results, with only slightly more preparation time.

The extra time may be worth it, too, considering that the chemicals of an over-the-counter cleaner may seep into your foods over time.

To keep your microwave fresh and clean, using organic materials only, here's what to do :

1. Unplug your microwave from the wall for safety.
2. Gather a microwave safe bowl; 1 1/4 cups of water; a lemon; baking soda; white vinegar; and cleaning cloths.
3. Slice the lemon and place the slices into your bowl. Add the water.
4. Heat the bowl in the microwave for 7 minutes. Leave the microwave door closed for an additional 5 minutes.
5. Remove the bowl (CAUTION : Bowl will be hot).
6. Remove the microwave's glass cooking surface and wheel system. Hand wash and set aside to dry.
7. Dip a clean cloth in the lemon water mixture. 
8. Wipe down the microwave's exterior and interior surfaces, remoistening the cloth as required.
9. Moisten a clean cloth with vinegar. Wipe down the microwave door's interior surface. 
10. Replace glass and wheel system, and plug the microwave back in to the wall.

If you find lingering stains in your microwave, mix baking soda with water to form a thick paste. Dip a corner of your cleaning cloth into the paste and apply it to the stain directly, gently rubbing in a circular motion until the stain is gone.

Microwaves should be cleaned at least once weekly for optimal performance.