Err... thanks guys.....Arnie, I had a good look at the harmonica before buying it, and have opened it up expecting to give it a clean, but it's fine. I know what you mean though, I used to think a beard was a good place to store food for later until I started playing the blues harp...
As to how I learned that one, I just kind of did. I use the "rolled up tongue" method to get the single note, experimented a bit, listened to a lot of blues and picked out approximate versions of a few tunes. I'm no master on the thing. I learnt in the days when I had a lot of time to dedicate to it, which surely helps. So i'd suggest jamming along to some records and perhaps with some friends. Learn a couple of hooks within a piece (Sonny Boy stuff, Capt. Beefheart....,) get some blues progressings endlessly repeating on a tape and go from there. Good luck, and never give up.
So, any one got any ideas about the chromatic..
Paul