Although very rare, two customers have received defective caps with a thin bit of plastic covering the hole. Luckily, the “fix” is simple!
This is what the hole should look like from the inside the cap:

This is what the hole should look like from outside the cap:

This is what a defective cap may look like:

THE FIX: Poke an awl, doll needle, finishing nail or other sturdy implement through the cap to create the hole.
Stephanie sent this photo, saying fixing it was “totally easy” and even though the hole she made was small, she said it worked perfectly. (After seeing pics of a normal hole, she enlarged the hole, as recommended.)

PLEASE contact us if this doesn’t solve your problem!