Skip to Content
Pointer Clicker is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Read more.

How To Clean A Projector Lens Properly? 7 Lens-Cleaning Tips

How To Clean A Projector Lens Properly? 7 Lens-Cleaning Tips

Everything was going so well with your new projector until

You’re watching your favorite movie, images on a family vacation, or you are in the middle of a very important meeting when it happens.

Your projector lens is making everything look like a murky cloud or showing spots or lines on every image you try to project.

Why is this happening?

Just look at all of the dust particles that dance around in the light stream as it projects toward the screen. See how many dust particles potentially land on the lens and stick.

Once the dust begins to stick to the lens, the quality of whatever you are viewing from the projector is quickly compromised.

Over time projector lenses are going to start collecting dust and dirt as well as smudges from your fingerprints. At least once a month you need to clean the projector lens to make sure you are viewing the best visual output.

Here’s what you will need to get started:

  • Microfiber lens cloth
  • Lens cleaning solution
  • Compressed air
  • Optional Cleaning Brush.

Please note: If you opt to use a cleaning brush to clear dust, make sure you have the right one for your lens, and never touch the bristles with your fingers.

Here are some additional projector lens-cleaning tips to keep in mind:

  • Never use water since it could damage the entire lens.
  • Never use your breath to clean since the tiny moisture droplets could damage the lens coating.
  • Never touch the lens with your fingers since the oil from your skin will leave permanent smudges.
  • Only use microfiber since other fabric or synthetic fabrics could leave stains or lint on the lens.
  • Be gentle to use very light pressure so you do not rupture or blur the lens permanently.
  • Always put the lens cap back on the lens when the projector is not in use and store in a dust-free environment.
  • Know what type of projector you have: Light-emitting Diode, LED, Liquid Crystal Displays LCD, or Digital Light Processing, DLP. An LED lens will tend to collect more dust.

How to clean the projector lens properly?

The most important thing to remember is to gently use the proper cleaning supplies so as not to scratch or damage the lens.

[BenQ FAQ] Projector_How to clean projector lens

Here’s what you need to know before attempting to clean the lens:

  • Make sure the cleanser you have is specifically made for your lens like this one from Amazon .
  • Never use harsh or abrasive household chemicals like isopropyl alcohol, benzene, or thinners since they can damage the lens coating.
  • Projector glass is very sensitive and prone to micro-abrasions.
  • To avoid leaving tiny scratches on the lens, make sure you use a lens cloth and never the end of your shirt or other coarse cotton fibers or a paper towel.

Now, you’re ready to get started:

  • Turn the projector off, and unplug it.
  • Allow the projector to completely cool down, between 30 minutes to a few hours, before cleaning the lens.
  • Apply the cleaning solution to a microfiber, lint-free cloth.
  • Never apply the cleaning solution directly to the lens.
  • Use the cloth to wipe the lens gently in a circular motion.
  • Never touch the lens with your fingers because skin oils will leave a mark.

How do you clean the inside of a projector lens?

You do not need to clean inside the projector lens every time you clean the lens unless you notice excessive humidity. If your projector’s image becomes too blurry or light, consider cleaning inside.

Projector lens cleaning tip you probably don't know
  • Make sure to unplug the projector and that it feels cool to the touch.
  • Follow your manufacturer’s instructions for opening the projector. If it is under warranty, take it to an authorized dealer or repair service.
  • Gently wipe the inside of the lens with a microfiber cloth.
  • Reassemble the projector case according to the manufacturer’s instructions.

How do you get the dust out of the inside of a projector lens?

There is a big difference between a dirty lens and a dusty lens: one requires cleaning with a solution, and the other would become more gummed up if you add moisture. The best way to clear out the inside of your projector from dust is to use canned, compressed air.

Remember that using compressed air will not damage the lens as long as you use it properly:

  • Make sure the kind of compressed air you buy is the specific kind recommended for your projector’s lens like canned air on Amazon .
  • Shake the air duster can well before using it.
  • To avoid cracking the lens, stand at least seven inches away from the lens before spraying.
  • Press the button on the can of compressed air, and move the entire can in a circular motion aimed directly at the lens to remove dust from the lens.

How do you replace a projector lens?

Over time, you will need to do more than just clean the lens. You may notice damage to the lens that requires replacing it.

How to change lens in your projector

To replace the lens:

  • Make sure to center the lens using a remote control or panel control buttons.
  • Turn off the projector and unplug the power cord.
  • Pull the lens cover off of the projector.
  • Firmly hold the lens as you slide the lock lever to the release position till you hear a click.
  • Grab the outside of the lens and gently pull it straight out of the projector.
  • Align and insert the new lens straight into the projector’s lens socket.
  • Firmly hold the lens in place as you slide the lock lever back to the lock position.
  • Replace the lens cover.
  • When you turn the projector back on, select yes if it prompts you to calibrate the lens.

What’s the bottom line on proper projector lens cleaning?

  • Your projector lens is very susceptible to damage, so use gentle care with the proper materials when cleaning.
  • Always put the lens cap on when not in use and store in an area that is not likely to have a lot of dust or humidity.
  • When it’s time to clean the lens, refer to these helpful tips we have just discussed for the best results.


This site uses Akismet to reduce spam. Learn how your comment data is processed.

This site uses Akismet to reduce spam. Learn how your comment data is processed.