Wajd.David

Probably the best way to clean a tank is to use hot water in a sonic cleaner (if you have access to one). I would not recommend the use of a sonic cleaner if you have a painted tank, it removed the paint from one of my tanks.

The "glass" tank is normally Pyrex, which is a tempered glass which perfectly fine to boil... think of your glass baking dishes or a laboratory beaker... they are made of Pyrex glass... 
BUT, you should boil the water, then set it aside to cool... THEN place the parts in the hot water (after the heat is removed)... allow them to cool with the water so they will not warp or crack due to extreme temperature changes.  Putting metal or Pyrex in hot water should not break them, but taking them out of HOT water, into cooler air will cause warping, cracking, or breakage in extreme cases.

Once you burn a coil, the taste permeates the entire tank.  The best way to clean it is to take it apart, clean with dish-soap and hot water (tap-hot)... use a brush or small sponge to get into all the crevices and don't forget the drip-tip, too.  Rinse well!!  Now, take a pan of water and boil it... once it boils, set if off to cool and put the tank parts into the VERY hot water... leave them there to cool with the water.  Once cool, you can air-dry them overnight and the tank should be good to go.  
You can also rinse with rubbing alcohol after you've cleaned and used the boiling water soak, but be aware that you MUST air-dry it for a day to ensure all the alcohol is gone... or you can soak in alcohol for a few hours... then air-dry overnight, then let the parts soak in boiled water again to flush out any alcohol residue.  
Many of us will soak our tanks in drinking alcohol (Vodka, moonshine, Everclear, etc.) which would be safe to vape any residual that may be left, but being 17-18 years old, I would not advise it for you...