@Vaper12345678 – Like many I am going to assume you are an ex smoker? And being a smoker I am sure you know which cigarettes can be smoked past their filter line and which ones can not. To me your questions about vaping and how far you can take an empty tank is no different. Also being new to vaping I to wanted to know what my thresholds were. So I pushed the limits to discover for my self and I have found there is no real definite answer. Every drop-in coil has its own characteristics on how much juice it can retain and dissipate. Some I have found to only offer 2 or 3 hits after the tank is empty before I get a dry burn while others seem to go on forever. The VG to PG ratio of juice you are using will also play a part in how much your coil will retain and dissipate after an empty tank. Experiment for yourself to find your own thresholds. At worse you may prematurely burn out a coil. But given the wide variance of quality with some of these coils that may happen even with a full tank. And if you do not want to experiment, then a good rule of thumb is to just keep juice in your tank. Doesn’t have to be full.
There is also no harm in storing a tank full of juice for a pro-longed period. At worse the coil may become over saturated which could lead to leaking (also dependent on the coil) or you may a get a bit of spitback for the first couple of fires. Leaking is a PIA but spitback is more of an annoyance than anything else…will go away after a couple of fires.
As for cleaning coils…many different tips can be found on the web on cleaning drop-in coils from vodka or Everclear (do not use isopropyl alcohol), to boiling your coils to just running them under warm water. I haven’t really found one method to be that much better than the other…YMMV. This may be of interest to some users but I have also used a pressurized steam cleaner on my coils. I have one on hand for various house hold cleaning duties. Just remember to hold your coil with pliers or something similar…holding them with your hand will guarantee a trip to the burn clinic! I have found this to be the quickest method
There is also no harm in storing a tank full of juice for a pro-longed period. At worse the coil may become over saturated which could lead to leaking (also dependent on the coil) or you may a get a bit of spitback for the first couple of fires. Leaking is a PIA but spitback is more of an annoyance than anything else…will go away after a couple of fires.
As for cleaning coils…many different tips can be found on the web on cleaning drop-in coils from vodka or Everclear (do not use isopropyl alcohol), to boiling your coils to just running them under warm water. I haven’t really found one method to be that much better than the other…YMMV. This may be of interest to some users but I have also used a pressurized steam cleaner on my coils. I have one on hand for various house hold cleaning duties. Just remember to hold your coil with pliers or something similar…holding them with your hand will guarantee a trip to the burn clinic! I have found this to be the quickest method