Don’t have lemon juice? Baking soda and white vinegar are both natural whiteners (and softeners!) that can be used when washing your sheets. According to Style At Home
, you can add half a cup of baking soda with your detergent at the beginning of the wash cycle. Then, just before the rinse cycle begins, pour half a cup of white vinegar into your washer. And, yes, the vinegar odor will rinse out.