First of all - two full weeks with no analogs and going great! 
So I went through the Bloog starter kit cartos and orders another 5 pack. I went through two of them no issue. However the third seemed to taste 'off' and kinda chemically/burned. I couldn't put my finger on the taste exactly, but it definitely wasn't right. So I tried the next carto. Same thing! The remaining three all tasted bad. So I ordered another 5 pack from a different supplier. SAME THING. First two were ok, last three were all bad - so bad one of the left a nasty taste in my mouth the whole night. ECH. What is going on?? When it happened with the second batch, I tried my other remaining batteries on them with no change. I tried a different carto (my wife's) on my battery and it's fine. I took the cartos in question apart. They had liquid in them but also had a little brown 'burnt' spot at the coil.
Any ideas? Are cartos this unreliable?

So I went through the Bloog starter kit cartos and orders another 5 pack. I went through two of them no issue. However the third seemed to taste 'off' and kinda chemically/burned. I couldn't put my finger on the taste exactly, but it definitely wasn't right. So I tried the next carto. Same thing! The remaining three all tasted bad. So I ordered another 5 pack from a different supplier. SAME THING. First two were ok, last three were all bad - so bad one of the left a nasty taste in my mouth the whole night. ECH. What is going on?? When it happened with the second batch, I tried my other remaining batteries on them with no change. I tried a different carto (my wife's) on my battery and it's fine. I took the cartos in question apart. They had liquid in them but also had a little brown 'burnt' spot at the coil.
Any ideas? Are cartos this unreliable?