Here's my .02, please take with a grain of salt
One problem could be clogged atty:
It could be the mesh beneath and around the heating element is clogged. Not enough air can pass through enough damp mesh to get any real volume of eliquid particles airborne in proximity of the heating element. (rinse thouroughly with alcohol-The alcohol can cause dried ejuice to liquify, so it can be drained out.-, roll up a dry paper towel and shove it up around the bridge. Leave battery side up overnight. If paper towel is saturated after several hours, apply a fresh paper towel and leave sitting battery side up again. repeat until no sign of moisture shows on paper towels after sitting battery side up for hours.)
When changing paper towels, suck on the atty to see if there is good airflow. If there is no apparent moisture but bad airflow then the mesh between the air intake and the heating element is still clogged, rinse some more with alcohol or maybe peroxide. Peroxide makes bubbles that can lift debris. I rinse with that and then the hottest tap water I can stand. Then start the drying process again. (I've only had to do it a couple times in 5 months so ymmv)
-if this all works, you should have a very dry atty with smooth airflow.
The other problem could be dryness :
The mesh beneath and around the heating element is dry. Sucking air across dry mesh pulls only air across the heating element. (This one is easy once you get the concept. A couple drops down the side, NOT onto the top of the bridge, NOT directly onto the heating element...After each couple of drops, take a tester puff to see if there is good vapor or not. Since you are intentionally missing the bridge and the heating element, the dry mesh beneath and around the heating element will start becoming saturated. At somewhere between 4 and 9 drops (not sure cuz I don't have a 510), the mesh will be sufficiently saturated that good vapor production occurs.)
That's really all I've had to do to keep my penstyles working until their heating coils pop

Good luck!