Put a coin in your shoe. It works great!

5. Auto-Stop Incense or Mosquito Coils

If you burn incense or mosquito coils and want them to stop at a certain point, just place a coin where you want it to end.

The coin absorbs heat and causes the coil to burn out exactly where you placed it. No more burning it down completely or waking up to smoke!

6. Keep Plant Water Clear

Similar to aquatic plants, if you keep cuttings or herbs in water, a coin can help keep things fresh.
Just drop one in the jar — it’ll slow down bacterial growth and keep the water from getting cloudy too fast.

Extra Tips for Best Results:

• Choose copper or nickel coins — they naturally fight microbes.
• The wetter the shoes, the more coins you can use.
• Replace coins in water every 2–3 weeks for full effect.
• Store a pair of coins next to your tape roll for easy access.
• Avoid using very old, dirty coins in shoes or water containers.

Bonus Trick from the Past

“My grandfather always taught me to put a bit of soap in my shoes after long walks — it kept them smelling fresh. But these coin tricks work just as well — maybe even better!”