Whats the point of using a specific cleaning solution for a gravel bike cassette and freehub when a degreaser and a brush seem to do the job just fine? Are the manufacturers of these specialized cleaning products just taking advantage of cyclists paranoia about maintaining their gear, or is there actually some scientific basis for using a gentle, specifically-formulated cleaner on these components? And if so, what exactly is it about the materials used in modern cassettes and freehubs that makes them so sensitive to harsh cleaning agents? Is it the anodized coating, the steel or aluminum construction, or something else entirely? And how do the benefits of using a gentle cleaner outweigh the convenience and cost-effectiveness of just using a degreaser and a brush?