Come on, today I got a new pod, I got a new coil in the same kit I was already using and started using it, I already noticed a difference when fitting the coil, it seems to have fitted tighter. I filled the pod with the same liquid and noticed that there was nothing liquid to the bottom, everything was stored in the top of the pod, before the first sealing ring. After a little use, I no longer had splitback and now I am having an excellent experience with the PM40. I'll wait for that coil to finish and test with a new one to see if it was just in pod my problem. Strange that the two pods that came in my kit were in trouble, one more than the other, but they were. Now is to continue testing. Thank you all for help!