Question: How can I clean my brass jewelry?
Answer: Most of the pendants are made of raw brass so easiest (and weirdest) way to clean them up is to put then pendants in ketchup! To do that, take a little bowl and put in some ketchup, add a splash of water, and mix it up. Then submerge the pendants in the ketchup for about 45 minutes. Then just take them out, rinse them under water, and dry them off really well. Typically that works really well for light tarnish and stains.
If it's really stuck on there I recommend Sunshine polishing cloths. I have some for sale in my Etsy shop here (https://www.etsy.com/listing/566221816/sunshine-cloth-in-tube), but you can find them at a lot of different places.
If that still doesn't work, you can try Brasso (https://www.amazon.com/Brasso-76523-Multi-Purpose-Metal-Polish/dp/B00BILDIU4). And if all else fails, Dremel with the polishing attachment and polishing compound :)