Best thing in the world to clean all the loose dirt and crud off a bicycle chain is something you’re probably throwing away every week. Take a few used dryer sheets and use them to wipe down the surface of the chain before applying new lube. (I’m using the Pedro’s Ice Wax and like it a lot). I still use one of those Park Tool brushes to get all of the crud out of the cogs and chainrings, but for wiping away the fine grit and soaking up all the dirty old lube, they shed less fibers than paper towels or those cheap home depot ‘shop towels in a box’. It’s less waste than throwing away a cotton shop rag every time too. If you use liquid fabric softener or don’t do laundry, I guess you’re out of luck. Small in the grand scheme of things, but I felt like sharing.