Someone sneaked into Inspector Collector's study and stole his "Leave Coin Cleaning to Professionals!" sign.
In its place, the thief posted the following methods for cleaning coins at home.
Which of these methods can be used to clean a really grimy coin?
And which methods were put here to trick people into ruining their collectibles?
DON'T TRY any of these methods until you've clicked "But is it safe?!" and checked out the method.
Scrubbing powder.
Because coins are metal, you can clean them with the same tools you use to scrub a dirty frying pan.
Sprinkle powdered cleanser on a scrubbing brush, and use it to whisk that dirt and grime away in no time!
Bare fingers.
Take your fingers and rub them softly over the surface of the coin, making sure to wipe all parts of the design.
If you're having a hard time removing troublesome dirt, you can use potato-chip grease to help soften the grime.
Wet polish.
Use moisture from your mouth to get the coin good and wet, and then rub it clean using a wool sweater or some other textured fabric.
The saliva will polish the coin, making it nice and shiny.
Washing machine.
The way you clean clothes is also a great way to clean your coins.
To keep them from getting scratched, be sure to tuck coins in the front pocket of your jeans.
Don't let your coins go into the dryer, though.
Soap and water.
After washing your hands with mild soap and water, lightly suds up the coin and rinse it.
Then, pat it dry with a soft towel, being careful not to rub the towel roughly against the coin's surface.