Can you wear the certain dri am everyday?

Yes. Certain Dri AM can be used everyday when used in conjunction with the Certain Dri Anti-Perspirant.

from http://www.certaindri.com/Pages/CD_Home

* New Certain Dri A.M. Underarm Refresher was created for Certain Dri Anti-Perspirant users as a daily supplemental product for added protection against odor.
* Used with original unscented Certain Dri, which is an antiperspirant (stops wetness), the two products make up the "Certain Dri Protection System".
* Certain Dri A.M. Underarm Refresher is specially-formulated to provide every day, all day freshness for those who suffer from excessive underarm perspiration.
* A Morning Fresh delivers additional all day deodorant (odor) protection when applied to the underarms each morning after showering/bathing.
* Continue to use Certain Dri Anti-Perspirant at night before going to bed to control excessive perspiration, and use Certain Dri A.M. Underarm Refresher every day after showering/bathing.