I have no personal experience with the smoke51, but on the site, it looks like a regular 3-part kit. Once you pull off the cartridge, ("Filter") you should be able to unscrew the atomizer from the battery.
Faq's
The middle piece (the atomizer) should simply unscrew from the battery.
I don't know how satisfied you are with your Smoke51, but looking at the site, and the pricing, Im curious if you've explored other
devices? There are a great multitude available that offer more battery life, more atomizer / cartomizer options, and greater overall performance at prices much less than Smoke51. If you're satisfied with the Smoke51, then great! Stick with what you like
If you want to explore the other options and prices out there, theres a lot of great info for beginners here:
New Members Forum
And more
threads, and stickies here:
General E-Smoking Discussion
I hope this helps, and welcome to Vaping!
I hope you find it as enjoyable as I do.
-Jason