Up until now I've been using the Smoke Relief system which uses all-in-one refills which are quite handy but becoming quite expensive. I want to get something where I can put the liquid in myself and hopefully save some money! The choice is bewildering however. I'm looking for recommendations for a "starter pack" to get me going, I don't want anything fancy but not anything so cheap it won't do the job very well/won't last me very long. A recommendation for which website to buy from would be great too, plus any general tip for beginners. Thanks in advance.