This can be a very frustrating issue, however is common with sub ohm tanks, luckily this can be solved and we can help guide you to a solution.
Probable cause of leaking：
- E-Liquid is too thin (high PG)
- O-rings or cotton is not in good condition
- Vaping setting is improper (too low a wattage used)
- Coil issue (Coil has reached its life span or has a manufacture defect)
- Sitting for a long time after refilling or tank is not sitting vertical
Take the tank completely a part, removing the juice first J
- Inspect all the seals, o-rings and gaskets and replace any that look deformed or have been damaged.
- Clean the airflow and dry off the atomizer
- Put the tank back together. Make sure everything is snug and not overtightened
- Make sure the atomizer is seated correctly and not threaded incorrectly. Also do not overtighten, but insure it is snug.
- Refill the tank. We suggest to close the airflow to eliminate the pressure that will force juice through the atomizer and into the airflow compartment.
Note: You may want to try another coil. Also Sub Tanks do not work well with low VG liquids. A 70VG/30PG liquid is recommended, although you might get by with a 50/50.
If you are still having issues, copy and paste the below link to Rip Trippers that show the 7 most common reasons and fixes on most leaking issues.
Let us know after trying the above solutions if you still have an issue.