If you are not going to use it, you can cancel. Per the Clear terms of service, you get a full pro rata refund.
Originally Posted by
chizinks
Since they pulled Terminal C and B clear lanes out of IAH, its no longer worth it to me....
I wish I was flying to SEA / DEN more often, but I've turned off my autorenew and will let it expire at the end of the year.
If you still have clear at your home airport and TSA pre-check, it's well worth the money.