Natural Brass Cleaner
We have a brass bed in our guest room that was tarnished and in need of a good clean. I didn't want to use harsh chemical though so used an old time recipe that works wonders.
It also super easy, which is always a bonus.
Just mix together 1 teaspoon of salt into half a cup of vinegar to dissolve the salt. Then add enough plain flour to make a paste.
Rub it onto your brass, let it sit for 5 -10 minutes then wipe off. Works great as you can from this brass bed knob, half was left untreated the other half after treatment.
Once you have the brass cleaned, I then recommend you seal with a brass sealer to prevent it tarnishing again over time.