what could this be?? something leaking mabye?
 

hello, my left front caliper ets some crap on it and then dirt sticks to it and it gets on my new z06 rim and its real hard to get off? i think something might be leaking from the caliper but i cant find anything. anyone have any ideas on what this could be? or where to look? thanks alot.

Um... maybe brake fluid? Have a friend press the pedal while you look for leaks. It's a high pressure system so you should be able to see any leaks.

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