I ordered a CE5 recently but wasn't using it much, as I have a CE4 and prefer it..anyways I went to fill up the CE5 last night (about 3/4 full), vaped with no problems, laid it down to go to sleep and in the morning the full tank had leaked everywhere. It appeared to have leaked from the mouthpiece. Did some Googling and was led to make sure there was an o-ring in place..checked, and there is..it looks just the same as my CE4 but I have no problems with it leaking. Help?? TIA.