Many items recommend only distilled water. A mild surfactant can be added, such as Dawn dish detergent but sparingly. Did you get the Vevo brand? It's one of the budget ones. I was considering it for my vynil records. After researching the results I read that you may still hear the occasional pop of crackle after cleaning. I get good results from using my Dishwasher cleaning pad. I mix distilled water and 1% of rubbing alcohol and a little automatic dishwasher rinse agent. I think the key for cleaning electronic parts, gears, wheels, etc is to get them completely dry before reassembly.