Hi Angie, and
I am newish also so someone with much more knowledge than me will be along.
Your ce4 though is a clearomiser, a cartomiser is a different thing, just wanted to point that out for when you go shopping.
Stick around here and you will do a lot of shopping
The ce4 you can clean by washing it in hot water, or you can give it a denture tablet or vodka bath, basically pop the ce4 into a filled container and leave it overnight, next day rinse thoroughly - you will then have to leave it to dry thoroughly before using again.
Some do not like this at all though .
Ce5's and updated ce4's are rebuildable ( you buy a new coil/ head this is the wick part ) I personally would not do this and I would not have another ce5 given but that is just my choice.
Update wise depends on how much money you want to spend.
As a newbie, the next step up battery wise would be a vision spinner, or an ego twist, they are like what you have now but give you control over the flavour you taste .There is more to it than that but that is the best way to explain it.
Regarding the bit that you put on top, the world is your oyster.
I wouldn't say it is updating more of finding what you like.
For something similar to what you have the I-clear 16 is fantastic- but it is thirsty you need to fill it more.
Other popular ones are the evod, protank and the nova.
;-|I vastly spending lots of dosh ...bit addictive isn't it 
