Tarnishing pressed pennies

[melindaandrob]

In previous threads we have seen great suggestions for cleaning pennies. We noticed that our shiny already pressed pennies are starting to tarnish! Any suggestions how to prevent this?

[LisaNJ25]

I use plain old erasures and that cleans them up .

[Lyon_King]

Taco Bell Hot Sauce... let them sit in it for about a minute.
Lemon juice and water, let sit for 5 minutes.

The acid in both substances "eats" away at the oxidation that caused the copper to tarnish

[phoebusII]

Vinegar and salt. But be sure to dry them right away or they will tarnish again in under an hour.