Bingo, that’s exactly what I do when they start to show any wear. I usually don’t bother until I see signs that it may wear through the surface, but you are good to go! The one thing that happened to me was I got to a point where I had to tighten the head more or it flickered. The key was the outer contacts on the BODY side. I took my Deoxit pen, which has a fiberglass point that wicks the fluid and ran it around that little ledge inside, and wiped it clean after a couple of minutes. Presto! Light twist, and it comes on solid and reliable. You could use a Q-tip and alcohol, but I think a mild abrasive is better for the aluminum, like a bit of Scotch Bright worked around there on a toothpick, or a little strip of very fine wet/dry paper. Whatever, just clean the oxidation off of the aluminum ledge when the contact gets dodgy.
Great day, my other cool and two warm C01’s landed today! Ordered two days after the first cool one, and came almost 2 1/2 weeks later, so no rhyme or reason to that.
I now have quite a bit of beam variations. The first cool had the slight hotspot most seem to have, due to the “reflector” being engaged, and I rather like it. The second cool has a very well defined hotspot, almost like a real reflector light, starting to get a bit of throw. I thought the LED might be deeper in the head, but it doesn’t seem to be. The reflector surface is a little shinier than the other, but it seems unlikely to make so much difference. My last hunch is that the spread of the beam is a little wider on this particular LED, so it’s putting more light on the reflector surface. Funny how that can work, wider beam from the LED, tighter beam from the light head!
Then my two warm units are about in between, both have a very noticeable hotspot, but not nearly so much as the tight beamed cool one. At the end of the day, I like them all for their individual merits, and the difference in “throw” for the distances that they will be used for really is not significant. My Gerber Infinity Ultra mod has absolutely no hotspot, BTW, and that may be due to it using a 45 degree LED, so no light is hitting the polished reflector (my mod).
Oh, and all clips seem fine, opened them as far as needed to go over a pocket or hat brim and they snapped smartly back. All outer contacts on the PCB go right to the edge of the board, like my first one. So these issues seem to be limited to a pretty small number of lights, at least so far.