• 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.

  • In my experience, no. The pad material is slightly porous and the fluid/grease/whatever soaks into it. You could try burning the contaminants out by putting them on a thick pan on a hob, which is the old garage bodge trick. I wouldn't though.

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