How can i make old dollar bills look new and crisp?

Question

nice and flat

Answer 1

Put them in a book, and stack other books on top of them....

thats what I do!

Answer 2

Dampen them -  not wet, just damp, or spray lightly with water.  Spread them out on an ironing board and spray with Spray Starch.  Iron slowly.  Careful not to scorch.  

Turn and spray and turn and spray. The starch gives it a nice flat and stiff look, just like new bills.  Don't over stiffen, however as Banks will become suspicious and may not take them.

Answer 3

you can iron them on low setting with light steam

Answer 4

Take them to a bank and get new ones.