Harmonica Players... Cleaning Advice

I have never had any luck cleaning mine, other than wiping the outside off with alcohol, Any more than that, always messes up the tone.

I wish I knew more than that, because they are expensive these days. LINK

Here is a video about it, but like I said, they have never sounded the same to me after I do this. I try not to play too loud anymore, that makes them last longer.
Cooking that one in a pressure cooker will probably melt it.