Be cautious when cleaning cast iron or aluminum pans with vinegar. If left too long, the acid could corrode the metal and damage the pan. Source

Hobby Farms

Do not add vinegar to an egg stain. It can cause the egg to coagulate and make it harder to clean. Source

Lynchburg Mama

Do not clean waxed wood with vinegar. It can ruin the finish and leave a cloudy mark. Source

Good Housekeeping

Do not mix bleach and vinegar. These two common cleaning agents should never be used at the same time, as it will emit toxic vapors. Source

Networx, "8 Ways Not to Use Vinegar"

Do not scrub grout around ceramic tile with vinegar. The combination results in an acid, which could be potentially corrosive and irritating. Source

Tile Council of North America

Do not use vinegar to clean your smartphone and laptop monitors. Both have a thin layer of oleophobic coating that limits fingerprints and smudges, and acidic vinegar can strip this coating, causing the layers below to be exposed. Source

Networx, "8 Ways Not to Use Vinegar"

Do not use vinegar when cleaning pearls. The vinegar can dissolve the pearls. Source

Any Clean , "Cleaning and Caring For Pearls Naturally"

Do not wash stone floor tiles with vinegar. The acidic nature of vinegar could damage the stone. Source

Good Housekeeping

Marble and granite are porous and can be worn down by acid such as vinegar. Instead, use a gentle cleaner made specifically for stone to avoid corroding the surface. Source

Good Housekeeping