I have an Arc AAA were the battery leaked on the negative battery connection and I can't seem to get it to come off. What can I use to break up the junk that leaked out of the battery? I tried scraping it out but it didn't work.
Try some automotive break cleaner - worked pretty well for me. I filled the barrel with that stuff and let it work for about 15 minutes... Afterwards I took a q-tip and used some metal polish to bring back the shiny aluminum.
Chris
edit: Just found that page about cleaning aluminum...
Here's a LINK to a recent thread on this very problem, with suggested remedies. I haven't tried any of them though, since it hasn't yet happened to me.