I was looking for a cure for a new Ce4 cartomiser problem I've been having, the dreaded 'burnt taste.After a quick google I saw this forum & spotted a thread about someone having similar problems last year. So I joined. I've seen a few vids on Youtube about cleaning and one of them spoke about removing the silicon nipple. The tread I saw here spoke about the nipple stopping the wicks taking up juice properly because the bottom edge of it was sitting on the wicks. So I pulled the silicon nipple and using a very sharp blade I cut a little window on each side of that bottom edge so that couldn't happen anymore. Result? No burning taste & the cartomiser is working as it should. Just thought I'd pass this on & hope it helps someone. 