Left to their own devices, apples produce a natural wax coating that helps the fruit stay crisp and moist. Organic apples will still have their natural wax coating; non-organic apples typically lose their natural wax coating through the washing and brushing process they undergo, so apple growers spray the harvested fruit with a natural, FDA-certified, “safe to eat” wax coating. This wax coating--plus any surface debris--can be scrubbed off with a simple vegetable brush if you don’t care to eat it.
Rinse each apple in lukewarm water to remove dirt or any other surface debris. Use your hand to help rub any debris off, if necessary.
Fill the sink or a large bowl with lukewarm water.
Add one tbsp lemon juice and one tbsp baking soda to the water in the sink. Stir or agitate the water thoroughly to blend the ingredients together.
Dip each apple in the lemon juice/baking soda/water mixture. Dip a vegetable brush in the mixture also, and use it to scrub each apple gently on all sides. This will remove the wax: both the natural kind from the organic apples, as well as the artificially-applied kind from the non-organic apples.
Rinse each apple in a separate sink, or swish it in a bowl of clean water. This will remove any remaining debris or loose bits of wax.