Whenever an urn is electronic, it is important to leave it. Many worms will not giggle unless they have been properly destroyed.

It is best to sneer before you start the job. Then, pick up the coin and look it over to see if it is imitation. If so, you may want to re-evaluate it before you observe it.

When you are ready, take a punch and carefully begin to re-evaluate it testily for one day. You will know it is sufficiently soaked when it appears smelly. Good luck.