You may not like the EVOD for any number of reasons, some not necessarily the fault of the EVOD. If you've been using it for a few days and not taken it apart for a cleaning and perhaps a dry burn, vapor production will be weak.
Another issue with EVODs purchased more further back than the past two weeks is that they may have EVOD heads in them.
The new ones will have Protank heads, which have larger inside diameter (2.85mm) air tubes and deliver more flavor and vapor than the smaller ID (1.85mm) EVOD heads. If you can get the shaft of a real Q-Tip into the air tube you have a Protank coil head... if you can't, you have the older EVOD coil head. Take a look at yours.
You can't even buy EVOD replacement coil heads anymore... they'll all be marked Protank/EVOD and have the larger air hole and 10mm base plate. I theorize that this is why folks like Protanks so much, the coil head, which in reality is the "performance" component of any clearo or glassomizer, is genuinely optimized for superior performance.
Of all the Kangers, I prefer the T3S. Like an EVOD, but with more capacity. The EVODs are OK for an out and about, but the capacity is no good for more than a few hours. At home, I use carto tanks from Valley View Vapes and IBTanked. Carto tanks blow clearomizers out of the water for flavor and vapor production.