You can remove the filler ring and just drip along the side or use a syringe along the side. The card may be referring to the smaller ones, the XL's hold 1.8 ml. From my experience, these last WAY more than 4 refills, I've filled mine 20+ times. They are done when the coil either breaks or stops working. No telling how long really.
Yes, you can clean them. Simply rinse in hot water for a minute and then do a dry burn (at your own risk with the Clearomizers) it has been done by others but you need to be careful with how hot you allow the coil to get. The plastic is likely to melt if it gets too hot. The dry burn will restore taste and remove the burnt gunk from the coil.
Hope this helps.
Yes, you can clean them. Simply rinse in hot water for a minute and then do a dry burn (at your own risk with the Clearomizers) it has been done by others but you need to be careful with how hot you allow the coil to get. The plastic is likely to melt if it gets too hot. The dry burn will restore taste and remove the burnt gunk from the coil.
Hope this helps.