How do i make brass cleaner ?

Vinegar, Salt and Flour. Make a paste to clean tarnished brass. Dissolve 1 teaspoon of salt into one-half cup of vinegar, and add flour until the mixture becomes a paste. Rub into the brass, leave for about 10 minutes, then rinse with warm water and buff dry.

Ketchup. Slather it on and leave it on for a while. Wipe off, rinse, and dry.

I use ketchup, let it set for sometime, wipe it off, rinse and then dry it.

To make an inexpensive homemade brass cleaner, mix equal parts salt and flour with enough vinegar to make a thick paste. Rub on vigorously with a damp cloth. Then wash, rinse, and dry thoroughly. Mix 1 tablespoon of salt and 2 tablespoons of vinegar in 1 pint of water.

I have brass hardware that gets hard water build up on it all of the time...this is how I clean mine to remove the hard water: https://gatheredinthekitchen.com/how-to-remove-hard-water-stains-and-buildup-on-faucet-fixtures/