How do you tell the difference between new and old contacts?

Question

i keep messing up my contacts and i am having a hard time figuring out which is old and new...

Answer 1

Why don't you throw old ones away when they are done their time ?

There will be a difference in the comfort if the old ones are too old , that should be a good sign.

Answer 2

Old contacts have a lot of tears and reside on them and new contacts are clean and clear. Hold them up to the light and you can tell very easily.