Glass Still Looks Streaky After Cleaning: This Vinegar Mixture Includes an Unexpected Kitchen Ingredient

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The mixture goes into a spray bottle or onto a sponge before being applied to the glass and wiped off. The recipe aims for a streak-free finish, but removing the mixture and polishing the surface are part of the method.

So why put a cooking ingredient on a window, and how do you remove it without leaving another mark behind?

The supplied extension guides present vinegar, cornstarch and warm water as a glass cleaner. Cornstarch is included in the recipe, though the cited instructions do not explain its role or establish that it outperforms other glass-cleaning methods.

The recommendation covers the complete process: mix the ingredients, apply the solution, then wipe and polish the glass. Spraying it on and leaving it to dry skips the finishing step.

Combine the ingredients and transfer the mixture to a spray bottle, or use a sponge to apply it from a container. Test a small spot out of view before treating the rest of the surface.

Apply the solution to the glass, then wipe it off with crumpled newspaper and polish until the surface shines, following the method given in the guides.

Work across the window in sections so you can remove the mixture before it dries. Finishing one area before moving to the next keeps the wiping stage close to the application stage.

The powder belongs in a mixture that is removed from the glass, rather than a coating left on the surface.

Window screens need a separate cleaning method; the supplied instructions call for a brush and detergent rather than the glass mixture.

The recipe also provides no basis for claims that it disinfects glass or prevents future marks. Its stated purpose is cleaning with a streak-free finish, achieved through application, removal and polishing.

Sources: Glass-cleaning recipe and instructions · Adapted cleaning guide