Hello! Where is the best place to recycle ink cartridges? I'm trying to "make" as much cash as we can for our trip in October! LOL! This has actually been a fun project. I redeemed coins we'd been saving for 6 years and had over $600, more than enough for our plane tickets! Anyways... I have: - 1 HP 57 - 4 HP 22 - 16 HP 21 Thanks in advance for any advice you have!!