Cat Crap Lens Cleaner

Richard L.
by Richard L.

Yes, when I first heard about Cat Crap I was a little surprised by the name as well. However, I have had numerous lenses that get covered in lint or dust. I have also had issues with lenses fogging. Despite multiple “solutions”, I have seen minimal improvement.

Carry Optics

Carrying a handgun with a Trijicon RMR daily has many pros, but the lint from daily carry and having to constantly wipe off the screen grows tiresome.

Less than 24 hours from the last cleaning.

As you can see, I have carried this pistol less than a day since I cleaned off the lens and already the optic has accumulated a reasonably substantial amount of debris. This causes the dot to not be crisp as the dust not only gets on the standard viewing lens but also gets in front of the source of the dot on the rear of the optic. Cat Crap is designed to repel lint and dust.

After Cat Crap was applied the lens looked far cleaner and the dot was crisp.

Eye Protection

When using eye protection, I previously had relatively decent luck not having substantial fogging issues. However, with the constant rain and hot temperatures, I recently experienced far more fog even on high-end eye protection. Fogging got so bad that the only option was to remove the eye protection entirely. Wearing eye protection without gaskets helps clear out and have less fogging, but the environment still has resulted in more fogging than I prefer. This significantly impacts performance even at close range engagements. Cat Crap is well known as the solution to reducing fogging lenses.

Seconds after the lenses were taken outside, the high humidity started to fog them up.
After applying Cat Crap, the lens not fog like they had previously, but the Cat Crap worked well as a cleaner.


Cat Crap‘s intended use is for glass and plastic lenses. Primary uses are for fog prevention and to repel lint and dust. Also, Cat Crap is safe to use on lens coatings. Ingredients include water, Glycerol, Coconut, Tallow Soaps and it is praised for being nontoxic. Simply remove any abrasive particles from the lens, shake the bottle and spray on the surface. Buff with a soft cloth until clear. Reapply when needed and do not wash off. Cat Crap can be found many places online for only $8 per fluid oz.

Richard L.
Richard L.

Richard lives in southern Indiana and has a strong interest in training, modified pistols, optics, and low profile gear/tactics. Some may consider it hoarding or some form of addiction, but he never tires in his pursuits as a stamp and lumen collector!For any corrections, input, or interest in posts, you can reach him at

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2 of 19 comments
  • Rock Island Auction Rock Island Auction on Jun 19, 2018

    Ha! This stuff used to be in bike stores back in the late 90s. Then it was in a tub and applied like a paste which you then wiped off. Glad to see a good product keeping on.

  • NeoBlackdog NeoBlackdog on Jun 19, 2018

    I've used this crap for years on my snow skiing goggles and it works great. Repels moisture and lint better than anything else I've tried.