Hey guys, I have recently been having issues with my protank 2. Currently I use 2.5 ohm atomizer heads, and use EC Blend e-liquid, vaping at 4.3 volts. First, is thi a good combination of voltage/resistance? I used to vape the same resistance at 3.8 ohms, but someone at my local b+m told me to bump it up to get rid of some of the gurgling problems I was having. All of the heads I use seem to have this burnt taste to them that I can't get rid of. I turned the cap on the head upside down to try to get more juice to the wicks, but this hasn't worked, This burnt taste happens even with brand new heads, and at all voltage levels. Also, the protank 2 hasn't been performing like it used to. It doesn't produce the same amount of vapor or throat hit as it used to. I have been having a bunch of issues with this batch of atomizer heads. I got them from LitecigUSA, is this a reputable vendor for atomizer heads? If not, can someone recommend me a new vendor? These issues continue to occur even after cleaning and dry burning, just for some extra information. Thank you for any help you might send my way!