I have an 18 inch tuneable Kevin O'Connell bodhran - which I love, it's a great drum, which is great for me, as I'm around 5 11, really long arms, and well, it's just the job. I have one bar, just so as I can keep a better hold on it if I move around.I use dubbin on the outside of my tuneable bodhran skin around 2 times a year, and only a little.
On my other bodhran, a Malachy Kearns bodhran - I used water sometimes when it is a bit tight, but as I have used it well, I don't get too many problems with it now.
The more you use it the better it gets!
Ella