I found this thread from @Luke a cupla months ago which talks a lot about maintenance and opening up the harp.
The other link 
I sent in my other reply for from JP in March of 2018 is pretty comprehensive. Though I had read it before, I read it again in its entirety yesterday. It covers most of what is covered elsewhere in the forum with excellent tips and advice on maintenance and playing in a way to make the harp last longer.
This is a picture of the last time I opened up my harps for a comprehensive check and clean 
In this photo you can see the 4 draw (4th from left) on my 008k which I blew a while back
