Ahh ok it sounds like you are using smokeymisers, if this is correct?
it could be due to the way that you are filling them, There is a very specific way
to fill these so that you don't get leaks.
You need to keep the rubber cover over the bottom of the smokey, remove the
drip tip and bung. Using a syringe or filling bottle with needle end, slowly fill the
smokey with it tilted slightly Keep the filling hole towards the bottom.
Leave a small air gap at the top, and replace the bung
as soon as its filled. you can then take the rubber cap off the bottom. Gently blow
through from the top to remove any excess liquid.
If you don't follow the filling instructions properly on this, then for some reason the
whole process will syphon the liquid straight out of the bottom.
I love smokeys, and once you have them filled and vaping properly they
work brilliantly, with loads of flavour and vapour.
Hope this helps a little, let us know how you get on.