On some sites, the Gerber light is great and on others it's a paper weight. Once I learned tracking, I picked it up right away so it's never been a problem for me but, hydrogen peroxide in a squirt bottle on a mist setting works. I keep 2 big bottles in the truck just in case. I read it in a mag long ago and tried it on my next track. It worked.
If your going to do something light CSI, buy yourself:
http://www.galls.com/style.html?assort=general_catalog&style=LE822&cat=2828
and
http://www.galls.com/style.html?assort=general_catalog&style=LE823&cat=2828
They will work much better. Trust Me!