My "cleaning" is to wipe dirty rims down with a paper towel, folding occasionally to keep the wiping surface reasonably clean. The result is better braking after a rainy ride and/or extra chain lube hitting the rear rim.
It still squeals sometimes, but I second (third?) the sentiment of these posters:
Originally Posted by
Al1943
I like the squeal, it lets the cars know where I am.
Originally Posted by
ThermionicScott
Or people, if you're on a MUP. Who needs to yell "on your left!" or ring a bell when a squealing brake not only alerts them to your presence, but that they made you slow down?