Try a 50/50 solution of vinegar and water for a streak-free clean. You can use a spray bottle or dip a rag in the solution, just like you would an ordinary cleaner. If you are worried about the fumes, only use vinegar for outdoor windows or mix a couple drops of essential oils to counteract the smell.

Mix equal parts white vinegar and water in a bucket (you can also make it in a spray bottle). Optional: add a few drops of dish soap to help cut through grease and grime. Use a dry microfiber cloth to remove dust or dirt from the window surfaces.

Combine two parts water with one part white vinegar in a spray bottle and you'll be all set with a homemade window cleaner. You can also combine warm water with a few drops of dishwashing soap if you prefer. Invest in a glass spray bottle to mix up your formula.

Soap Overload Too much soap can leave a residue on the glass, causing smears. A mild soap mixed with water or a commercial window cleaner should suffice.