Yeah I'm very paranoid to use PBW on anything other than glass (which it cleans amazingly).Yeah...I've cleaned mine about 5 times now with iso. Throw it in a baggie, put it in my cheap little ultrasonic cleaner surrounded by hot water for 5 minutes and I never need to use a brush to clean any of the teeth. Comes out spotless...like brand new. Absolutely no damage to the anodized surface.
Never soak it in PBW, however. There are old pics on FC of someone's Space Case not fairing well using that method. PBW is great for glass...bad for grinders...lol