@munkhorgil18434 use a rag and water to clean off any gross contamination. Then use some +95% isopropyl alcohol for a final clean. Again, use a clean rag for that and not a paper towel. Yes, you can also use commercially available brake cleaner. Make sure you take care of the pads as well. Use some #200grit paper to scuff them up and get rid of some of the debris on those pads.