I am loosing more juice than I am using in my Kayfun Lite

[crxess]

Nothing like doing things half assed when your not sure.

If an o-ring is causing a leak, replace the o-ring, don't double it up.

Likely the o-ring was stretched when assembling(DRY) BTDT

Rebuild parts are available on Ebay - FatDaddy Vapes just about anything you will need.