Bug inside your screen? Here's what it is and how to get it out
A tiny black speck crawling across your monitor, laptop or TV, or one that has stopped and now looks like a dead pixel, is very likely a thunderfly (thrips) trapped inside the screen. These insects are only 1–2 mm long, are drawn to light and warmth, and slip in through ventilation gaps, especially on warm, humid summer days. It happens with every brand of screen.
Bug, dead pixel or dust? How to tell
| Bug inside the screen | Dead pixel | Dust or smudge | |
|---|---|---|---|
| Moves? | Moves, or has moved before | Never moves | Moves when you wipe |
| Size and shape | Thin and longer than a pixel, sometimes with legs | Exactly one tiny square | Blurry or irregular |
| Where it shows | Dark speck on bright colors, sometimes with a faint shadow | Black on white, red, green and blue | Shows best on black with light at an angle |
| Wipes off? | No | No | Yes |
To see it clearly, open a full white screen. To rule out dead or stuck pixels, run the dead pixel test.
How to get a bug out of your screen
- Don't press on it. Squashing the insect inside the panel leaves a permanent mark and pressing can damage the screen layers.
- Give it time. Many thunderflies find their own way out within a few hours to a day or two, especially once the room is cooler.
- Try guiding it with light. Because they are drawn to light, some people have success dimming the screen and showing a small bright area near the nearest edge, then moving it outward. It does not always work, but it is harmless.
- Avoid blowing air into the vents. Compressed air can push the insect deeper into the panel.
- If it has died inside, it usually stays put. It is cosmetic only; removing it means opening the panel, which is best left to a repair shop.
How to keep bugs out of your screen
- Keep screens away from open windows on warm, humid evenings, when thunderflies swarm.
- Use insect screens on windows near your desk or TV.
- Turn screens off at night with the window open; a glowing display attracts insects.
- Dust the vents regularly so insects find fewer places to hide.
Frequently asked questions
What is the tiny bug inside my monitor?
It is almost always a thrips, also called a thunderfly or thunderbug: a thin insect about 1 to 2 millimeters long. They are common in summer, especially in warm, humid weather, and are small enough to slip into a screen through ventilation gaps.
How did a bug get inside my screen?
Thunderflies are attracted to light and warmth. They crawl into monitors, laptops and TVs through vents and the gaps around the panel, then end up between the layers of the screen where you can see them but cannot reach them.
Will a bug inside my screen damage it?
Usually not. A live insect is only a distraction, and a dead one leaves a small dark speck. Pressing on the screen to squash it is what causes damage, so do not push on the spot.
How do I get a dead bug out of my monitor?
A dead insect between the screen layers stays where it is. Removing it means taking the panel apart, which is a job for a repair shop and may not be worth the cost. Warranties often do not cover it, and opening the screen yourself can damage it.
Is it a bug or a dead pixel?
A bug moves or has moved, is usually longer than a single pixel and may show legs or a slight shadow. A dead pixel never moves and is exactly one tiny square. Open a white screen to see it clearly, and run the dead pixel test to check every color.