I found an easy and less messy way to fill the new 4ml carts . Simply put your ejuice into an old cartridge case and after you remove the mouth piece and cap from the cart stick the cart on top of the empty cartridge case and lay it down like so
No dripping out of the battery end of the cart . It absorbs what it needs so you can pour the excess back into your juice bottle
No dripping out of the battery end of the cart . It absorbs what it needs so you can pour the excess back into your juice bottle