Make your mouthwash work a little harder. You may not realize this but it is useful for quite a few jobs around the house and leaves a lovely fresh scent behind too!
Clean your computer screen and leave a minty scent (but NOT for LCD screens!).
Use it in the bathroom beyond your mouth.
Make an odor-eater in the kitchen. Working with garlic and onions can leave your hands with a strong odor long after the food has been cooked. To zap the scent, soak a cotton ball with mouthwash and apply it to your hands. This aroma therapy works best when you let the mouthwash dry before rinsing. Likewise, mouthwash or just plain alcohol can also banish underarm odor during a midday emergency.
Turn it into a great laundry aid. A cup of alcohol-based mouthwash is great for killing germs in the laundry, especially if you're washing very soiled items. Add to the regular cycle.
Create an anti-fungus treatment.
Use it as a low-cost skin treatment.
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