Opalescence PF 20% Teeth Whitening 8pk of Mint flavor syringes (2 tubes of 4 syringes)

what are the correct instructions for use ....mine came without instruction leaflet

As noted above there is an expiration date on the syringe. What is the expiration date on yours?

Does the product come with an expiration date that you can read so you can tell whether it is still full strength or not? (Edited to add, another commenter decoded the batch ID on each syringe, it's Letter + 3 digits, and the three digits are MM/Y where MM = the expiration month and (201)Y = the expiration year. The b…

WHAT IS THE EXPIRATION ON THESE