I've been researching mold abatement for the action of a Kawai upright piano. I feel like I'm getting nowhere with my research. Has anyone done any work like this? I'm thinking of wiping down the wood parts with a diluted bleach solution. I may put the action outside on a sunny day to expose the felt to some UV light. The action is completely functional and, aside from the mold, in good condition. Any other suggestions on dealing with the felt that has mold, including the hammers?