You bought a Swiss automatic watch. It was running perfectly for months, maybe gaining 5 seconds a day.
Suddenly, overnight, it goes crazy.
It’s running 20 seconds fast. Then 1 minute fast. Then 5 minutes fast per day.
You didn’t drop it. You didn’t bang it against a door frame. You probably just put it on your nightstand next to your iPad or stereo speaker.
Your watch isn’t broken. It’s magnetized. And the good news is, you can fix it at home in 10 seconds for less than the cost of a movie ticket.
Why Does Magnetism Happen?
Inside your mechanical watch, the most critical part is the Hairspring. This tiny, coiled spring breathes in and out, regulating the time.
When exposed to a strong magnetic field, the coils of the hairspring become magnetized and stick together.
- The Result: The effective length of the spring shortens.
- The Physics: A shorter spring beats faster.
- The Outcome: Your watch runs incredibly fast.
Common Culprits:
- iPad/Tablet Smart Covers (Strong magnets!)
- Laptop speakers
- MRI machines
- Purse clasps
- Induction cooktops
How to Test: The Compass Trick
You don’t need fancy equipment to diagnose this. You just need a cheap magnetic compass (or a compass app on your phone, though a physical one is better).
- Place the compass flat on a table. Wait for the needle to settle North.
- Hold your watch closely above the compass.
- Move the watch around the compass.
- The Verdict: If the compass needle swings wildly and follows your watch, your watch is magnetized. If the needle barely moves, your problem is something else (likely it needs servicing).
The Fix: How to Demagnetize at Home
Do not pay a watchmaker ₹2,000 for this. Go to Amazon and buy a “Blue Box Demagnetizer.” It usually costs between ₹800 and ₹1,200.
Step-by-Step Instructions:
- Plug it in: Connect the blue box to power.
- Position: Hold your watch about 1 inch (2-3 cm) above the box. Do not touch the plastic surface directly.
- Activate: Press and hold the Red Button. The red light will turn on.
- The Move: While holding the button, SLOWLY lift the watch straight up and away from the box. Move it about 2 feet away.
- Why? This pulls the watch through a decaying magnetic field, scrambling the magnetic particles until they are neutral.
- Release: Only release the red button once the watch is far away.
Retest:
Do the compass test again. The needle should now be still. Reset your watch time, and you should be back to normal accuracy.
Can Magnetism Damage My Watch Permanently?
No.
Magnetism is a temporary condition. It does not physically damage the gears, oils, or steel. Even if you leave a watch magnetized for a year, demagnetizing it will return it to perfect health instantly.
Pro Tip: Modern watches with silicon hairsprings (like the Tissot PRX Powermatic 80) are virtually immune to this problem. Vintage watches are highly susceptible.
Need more tools?
- Scratched Crystal: How to Fix Acrylic Scratches with Polywatch
- Back to Basics: Watch Care 101: The Ultimate Guide
