I built a mod using a 510 atomizer connector in a small metal box with a hinged lid. It works great other then leakage from the base of the atomizer where the vent holes are. Liquid leaks from the vent holes and runs under the lid on the outside of the mod. Every time I open it to change batteries I have to wipe off the e-liquid that has leaked out. Is there something I can do to correct this? Would this be a defect in the atomizers? Or Is it just that I am adding too much liquid?