Hi there, first time posting here. I have a Yahama TRBX305 that's only 1 year old and I'm seeing this white stuff on the bridge and tuning knobs. It doesn't seem like rust since I can seem to scratch them off with my fingernails but was wondering how I can clean and prevent them in the future. For context, I always wipe my bass after use with a microfibre cloth. But I'm also thinking that the bridge accumulation is from my hand whenever I palm mute. Any advice on how to clean this as well as maintenance will be greatly appreciated. Thank you!