Just want to make a few comments about a Ferrofluid leak.
1. This stuff stains everything it comes in contact with, so if for some reason your cell springs a leak, put it inside a plastic bag and don't touch the liquid! It will take a lot of scrubbing and cleaning to get it off of your fingers.
2. The Ferrofluid used inside the cell is not toxic or dangerous if you do get it on you or ingest it (can't imagine why anyone would eat it), but it is safe when it escapes the cell.
3. If you do experience a leaky cell, please let me know via email and I will arrange to ship you a replacement cell ASAP. Return the defective cell to me and I'll credit your PayPal account the shipping charges.