If you need a reason to get one of these, leave your strings dirty for a week and notice the difference between dirty and new. Then think about how this is going to keep your strings much closer to new than dirty. It's essential for all higher end violins, those Dominant or Pirastro strings aren't cheap, why would you let them corrode quicker than they need to? Don't let your instrument fail because you failed to clean your strings. Make the right choice and get this guy, never worry about if your strings will play again!