And a fine Q tip it is. The same works for weapon mounted flashlights. I sometimes use a lens pen here at work. Most of the officers have lights on their Glocks and they get nasty and icky pretty quick too.
I'm not sure what the lense is made of on the CT, I've not needed cleaner on mine but I use M Pro 7 or Hoppe's Elite (same exact thing) on the flashlight lenses and it works real well.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."