The CE2's work very good and last longer between refills than any regular cartomizers, has no filler material to burn so is a cleaner vape. You can pull the clear tube off and run under hot water and squeeze the string like fiber with a paper towel to get most of the moisture out of it, and then do a dry burn while its apart to clean the gunk off the coil. Just pulse the battery button and watch the coil get red and do this until the coil gets red quickly when you hit the button. What nice is after you do this its like NEW again. Put the clear tube back on, then put the cap over the cup and align the notches in the cap to go over the rope on both sides, and refill with a syringe and your back in business. I really do like the XL Clearomizers and they don't cost anymore than the standard cartomizers. I have tried tanks and every other cartomizer out their and have not found a better one to use. Like one of the other posters said the only problem is they do crack after a while, but so what throw it away and use a new one just like you would with the regular cartomizers. Don't be shy asking questions here on the ECF, lots of very nice folks will answer your questions. Always remember the only dumb question, is the one you don't ask, how else will you learn from other people and their experiences. Hope this is helpful.