Remember that disposing of the coil should be a last resort. Before replacing the coil, it is worth checking if there are any connection problems. Simply unscrewing the coil, giving it a wipe and screwing it back in can solve a lot of issues.
If you experience a bubbling sensation (flooded coil) you can disassemble the device removing the coil and base of the clearomizer before attaching directly to the battery. Press and hold the battery to burn off any excess liquid.
If liquid has leaked into the central column, you can ‘whip’ off the excess liquid through the mouthpiece over a sink before reassembling the device as normal.