• What's the best way to clean rotors? I can't figure out if the pads are contaminated, the rotors or both so I've got new pads and want a foolproof way to clean the rotors.

  • Douse in isopropyl alcohol, or brake cleaner. Wipe clean with a paper towel. If you're really worried, run some medium grit sandpaper over them before all of the above.

  • I use Muc-off brake cleaner but I'd use IPA when that can runs out. Failing that I'd just brake really aggressively until the pads worked or wore out.

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