I guess I must have been lucky but the only complaint I have with the CE2 XLs is how often I have to fill them. Great vapor and they wick to the bottom. Sooo much better than everything else I tried. Granted I do pull the inner ring and trim out the wick slots some. Since I got them for $1.40 each and since I don't see much improvement from cleaning, after a week when the vapor drops off I just pitch them. However when the Giantomizers come out I may be sorry I bought 100 of the XLs.