About a week ago, after constantly having trouble getting my ultra to fire due to my sweaty hands, I started trying to think up a solution. After much thinking and noticing that I had no trouble getting a grip on unfinished metal (even with sweaty hands) I went and got some 600 grit sandpaper from home depot and lightly-very lightly-sanded alittle bit of the finish off the inner battery sleeve-and it worked! No more grip problems ever since I did the sanding, which was 3-4 days ago. This will make the inner battery sleeve not as shiny, but for me atleast, was totally worth it. Anyone else done this or have thoughts?