Fill a clean spray bottle with full-strength white distilled vinegar. Be sure to label it.
If you're a cheapskate like me, you might be tempted to use an old cleaning bottle. DO NOT use a bottle that has had bleach in it, as the result is toxic chlorine gas.
Keep a bottle in the laundry. Use this to spray on shirt collars and under the arms. Spray it on mustard stains, too.
Keep a regular white vinegar bottle in your laundry room as well. Pour a half a cup into your wash to fight stains, smells and lint. You can also add a quarter cup to the last rinse of your laundry. It prevents yellowing, acts as a fabric softener and static cling reducer, rids clothes of mold and mildew, and removes soap.
Keep a spray bottle in your kitchen to wipe your counters, just as you would use store-bought sprays. White distilled vinegar kills bacteria, mold and germs; and it's non-toxic.
Vinegar has many other uses. Spray in the direction (not in the face) of a barking dog. Spray a piece of furniture that a cat sctratches. (Test for color-fastness first.)