Your Recipe: 50/50 Vinegar All-Purpose Spray

Your Recipe: 50/50 Vinegar All-Purpose Spray

White vinegar is typically about 5% acetic acid, and that mild acid is why it works. It dissolves the mineral deposits left behind by hard water and loosens the soap-and-mineral film on shower glass, faucets and sinks. Mixed half vinegar, half water, it is strong enough for stuck-on spots but gentle enough for everyday wipe-downs. For a full 24-ounce bottle use about 1 1/2 cups of each, and shake it lightly before use rather than making foam.

Where not to use it matters as much as where to use it. Skip vinegar on calcareous natural stone such as marble, limestone and travertine: the Natural Stone Institute says products containing lemon, vinegar or other acids may dull or etch these stones. For granite or an engineered quartz counter, ask your fabricator before using acids. Also check the maker's care guide before using it on unsealed or waxed wood, the grout of stone tile, cast iron, rubber seals and screens. It also does not grease-cut well, so kitchen grease is a job for the dish-soap recipe. Vinegar is not an EPA-registered disinfectant, and EPA says it does not review the effectiveness of common household ingredients like vinegar, so do not count on it to kill germs after raw meat or illness.

The never-mix list is short but strict. Never combine vinegar with bleach: poison centers and the Washington State Department of Health say bleach mixed with an acid such as vinegar releases chlorine gas. Never put vinegar and hydrogen peroxide in one bottle, because they form peracetic acid, which the Missouri Poison Center calls corrosive and irritating to skin, eyes and the respiratory system. Do not add vinegar to castile soap: Lisa Bronner of Dr. Bronner's explains that the acid breaks the soap into a curdled, oily residue. Label the bottle 'Vinegar + water 1:1, sealed hard surfaces only' with the date, use a bottle you never used for another cleaner, and store it capped, out of reach of kids and pets, away from bleach and ammonia products.

If you spray vinegar somewhere bleach was used recently, stop and ventilate before you do anything else. If a mix goes wrong, leave the room and get fresh air right away, open windows, keep kids and pets out, and call Poison Help at 1-800-222-1222 (US, America's Poison Centers). Call 911 for trouble breathing, chest pain, or if someone collapses. To make the spray, pour the water in first, add the vinegar, cap and swirl. Test on a small hidden spot first, spray, let it sit briefly, then wipe with a damp cloth and dry. Use the calculator below to scale the recipe for a mop bucket or a weaker floor mix.

Source: EPA, Can I use common household substances to kill the novel coronavirus?; Washington State Department of Health, Dangers of Mixing Bleach with Cleaners; Missouri Poison Center, Some Things Just Don't Mix; Natural Stone Institute, consumer guidance on cleaning natural stone; Lisa Bronner (Dr. Bronner's), Why Vinegar & Castile Soap Don't Mix Well. Note: the 1:1 ratio is a common home practice, not a published standard; vinegar acidity varies by brand, check the label.

General household-cleaning guidance, not medical or professional advice. The label on your product always wins; never mix cleaning products. For a poisoning emergency call Poison Help at 1-800-222-1222 (US), or 911 if someone has trouble breathing.

How Vinegar all-purpose spray compares

* Illustrative starting amounts and notes, rounded -- use the calculators below for your exact numbers, and always check your product label.